Oops. Sorry to ruffle feathers. :)
Rickey, you're speaking to someone sympathetic to computer mishaps, which is what the Mis merge sounds like. If we don't try, we don't learn, and improve. Those of us who are more experienced need a little tolerance for the learning curve, wouldn't you say?
And it's part of what curators are for: helping to fix the errors (mechanical and / or genealogical); and using the tools as hand to further protect data quality.
So i didn't really address the Mis merge; if we had caught it sooner, i could have tried "merge undo.". But as you noted up front, it's been a tortured tree without enough attention for some time.
So let's focus on getting better / more sources & citations in there ....