Usernames dissapear when switched to these Usergroups (???????)

[Vital Signs]

Well, I have roughly 13 usergroups in all.

I am using 1 username I made up called "Test Ranks" so I could test out the site before it is launched here soon.

For some odd reason when testing out the usergroups, I made a post with "test ranks" and then went back and forth switching usergroups and checking to see that it worked in the post. For some reason, when I use 2 of my usergroups, his username (Test Ranks) disappears ....

Any idea what could be causing his username to disappear and how I can fix it? The avatar I am using for him jumps right up to the top of the postbit as if the username was gone completely. Everything else shows from his user title to his rank, just his name is gone ....

Thanks for any help!