GTM pool names all listed with the same name

This sounds familiar. Mine did the same thing except with the servers. I think its due to the mcpd db getting corrupted. This is what fixed it for me. what version are you running?

1.) Backup UCS archive on all GTMs.

2.) Remove GTMs from synchronization group:

System > Configuration > Global Traffic > General

- Uncheck Synchronization and Synchronization DNS Zone Files

- Click on Update button.

3.) Force reload mcpd per SOL:

SOL13030: Forcing the mcpd process to reload configuration

http://support.f5.com/kb/en-us/solutions/public/13000/000/sol13030.html

touch /service/mcpd/forceload

reboot

4.) Repeat step 3 on all GTMs.

5.) Once GTMs are back up, ensure that server object names are no longer the same name.

6.) Re-add all GTMs into synchronization group:

System > Configuration > Global Traffic > General

- Check Synchronization and Synchronization DNS Zone Files

- Click on Update button.

7.) Perform installation of v11.2 iso and engineering HF iso into target boot location.

8.) Boot into new boot location.