For that instance, perhaps it wasn't correct to merge Hotgen. As it seems they are HotGen from 2008 to present and HotGen Studios from 1998-2003. That is what Mobygames has for them.
We can't undo the merge now, only add HotGen Studios and change the relevant entries.
Typically for company names, Mobygames company history pages are the reference, not GameFAQs. And we do not need to use full corporate titles, as usually portions of names like Inc, Ltd, LLC, Co. (and their full terms) aren't needed except in rare cases.