Hi Dustin,
It could just be some type of glitch that has caused the creation of the extra User branch, Hopefully that's the case.
I would however, recommend that you do a full scan with both the packages as they are specifically targeted against Trojans and the like, and there removal, whereas AVG and ad-aware are more tailored to stopping virus attacks getting onto the machine.
Both packages are free for private use and are useful additional tools to keep available, they will quite often find things that others do not, unfortunately, due to the multi-pronged nature of today's malware attacks we have to take the same route to stop them.
Hopefully, as I said above this is not malware, but it's worth while checking.