I draw your attention to...
As nobody contributed to a Go Fund Me I'm afraid I've just used by holiday allocation on a splendid holiday in Port Douglas and Cairns snorkeling the Great Barrier Reef, swimming with Turtles, standing on a boat...
No not normal for the undertray bolts to be seized. It's probably had the oil sucked out, rather than drained via the sump plug. If the sump guard is removed every oil change, they don't have time to rust in, but also a bit lubrication on them...