I found the problem. It looks like someone from within your guild submitted data and they didn't have the Show Offline Members box selected which caused the process to think that only the online members were now in your guild. This caused it to remove everyone that wasn't online from your guild, but it set the guildid incorrectly.
This isn't something I had thought through enough so I'll have to rethink how I utilize the guild info.
Rollie, that must've been me. I run the census mod very often and submit the data. It would also explain why my lvl60 mage's signature works fine (since I scanned with him last). And I never have my guild panel to show offline players since I want to know who's on.