Okay, so on my Steam profile, you can see my primary group. It keeps somehow changing to something different every day or so, I have to keep switching it back to Aprilon Dynasty.

Any suggestions as to what I can do?

I really dont see what you can do except changing your primary group to Aprilon Dynasty.

Leave every other non-important groups

If nothing comes up here, ask in the Steam forums and/or steam support.

I seem to have found the problem, it occurs when I change any aspect of information on my Steam profile.

Just leave all the other worthless groups

I really should, but can't be arsed

Yes do that, Aprilon is where its at ;D