ASM DNS Servers

We are in the process of migrating to new DNS servers and I needed to update the DNS on the F5. I went into System -> Configuration -> Device -> DNS. I added the new DNS server in the DNS Lookup Server List and removed the old DNS servers. If I log into the console of the F5 and run an nslookup it uses the correct DNS server and all is good. If I go to Security -> Options -> Application Security -> Attack Signatures -> Attack Signature Updates. From this page when I manually check for updates and review my network logs. The F5 is making DNS queries to the DNS server I removed from the DNS Lookup Server List.

 

Is there another spot I need to up my DNS server settings?

 

We are running 11.5.2