So, I logged in just before the break between 13:46 and 13:47 (below). It seems to show the correct pool momentarily but it never goes to that server, then it sets itself back to the default pool "main" even though the cookie "username" still exists.
Here is the tail -f of the log:
Jun 29 13:46:55 tmm tmm[719]: Rule login : If: Current pool is main
Jun 29 13:46:55 tmm tmm[719]: Rule login : If: Pool set to login1 by iRule
Jun 29 13:46:55 tmm tmm[719]: Rule login : If: username cookie from client, contents are: If-Modified-Since: Tue, 20 Jun 2006 20:05:34 GMT
Jun 29 13:46:55 tmm tmm[719]: Rule login : If: Current pool is
Jun 29 13:46:55 tmm tmm[719]: Rule login : If: Pool set to login1 by iRule
Jun 29 13:47:01 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:01 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:02 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:02 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:06 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:06 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:06 tmm tmm[719]: Rule login : Else: Default pool is
Jun 29 13:47:06 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:06 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:06 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:06 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:06 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:06 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:06 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:06 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:06 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:07 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:07 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:07 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:07 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:07 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:07 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:07 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:07 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:07 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:07 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:07 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:08 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:12 tmm tmm[719]: Rule login : If: username cookie from client, contents are: If-Modified-Since: Thu, 29 Jun 2006 19:30:38 GMT
Jun 29 13:47:12 tmm tmm[719]: Rule login : If: Current pool is main
Jun 29 13:47:12 tmm tmm[719]: Rule login : If: Pool set to login1 by iRule
Jun 29 13:47:14 tmm tmm[719]: Rule login : If: username cookie from server, contents are:
Jun 29 13:47:24 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:24 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:24 tmm tmm[719]: Rule login : If: username cookie from server, contents are:
Jun 29 13:47:33 tmm tmm[719]: Rule login : If: username cookie from client, contents are: Content-Type: application/x-www-form-urlencoded
Jun 29 13:47:33 tmm tmm[719]: Rule login : If: Current pool is main
Jun 29 13:47:33 tmm tmm[719]: Rule login : If: Pool set to login1 by iRule
Jun 29 13:47:33 tmm tmm[719]: Rule login : If: username cookie from server, contents are: qspel12
Jun 29 13:47:33 tmm tmm[719]: Rule login : If: username cookie from client, contents are: qspel12
Jun 29 13:47:33 tmm tmm[719]: Rule login : If: Current pool is main
Jun 29 13:47:33 tmm tmm[719]: Rule login : If: Pool set to login1 by iRule
Jun 29 13:47:34 tmm tmm[719]: Rule login : If: username cookie from server, contents are:
Jun 29 13:47:40 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:40 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:48 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:48 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:52 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:52 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:52 tmm tmm[719]: Rule login : If: username cookie from server, contents are:
Jun 29 13:47:52 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:52 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:52 tmm tmm[719]: Rule login : If: username cookie from client, contents are: If-Modified-Since: Thu, 29 Jun 2006 19:30:48 GMT
Jun 29 13:47:52 tmm tmm[719]: Rule login : If: Current pool is main
Jun 29 13:47:52 tmm tmm[719]: Rule login : If: Pool set to login1 by iRule
Jun 29 13:47:53 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:53 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:53 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:53 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:53 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:53 tmm tmm[719]: Rule login : Else: Pool set to main by iRule
Jun 29 13:47:53 tmm tmm[719]: Rule login : Else: Default pool is main
Jun 29 13:47:53 tmm tmm[719]: Rule login : Else: Pool set to main by iRule