Error with a manual group and baseline

So for some reason ever few months it seems the baseline we have associated with a manual group seems to start hitting other machines. For instance. let’s say we created a manual group called “Office Installs” and then created the baseline for it that installs several different programs. Now it will work for a while so we can throw a computer in the group and it will install everything. Also after it kicks it out. But after a few months it seems to start pulling random computers into the baseline itself. They will not be in the manual group. Although the baseline starts targeting random machines.

Any idea’s where I can look? I see no one has modified it or change any settings to the group or baseline.