Tranny oil pan issues....

I get the feeling she just doesn't want to be restored.......
So.... Dropped the pan to change the gasket hoping to stop my fluid leak. Changed the filter while I was at it. Was surprised how great things looked when I removed the pan. All went easy, got the pan bolted back up with the new gasket, hand tightened all the bolts, began to torque them to spec and two bolts just spun, wouldn't tighten down. Swapped them out with adjoining bolts and they tightened right up in the holes next to them. Bolts from adjoining swap had the same issue in the original holes, they wouldn't tighten so it looks to be housing thread problems. Seriously? How do the threads in the housing go bad? And what the heck can I do to fix? Seriously frustrated and any help is, as always, appreciated.