Welcome to my nightmare
mine are exactly the same, and night nappies are the worst. I usually try the distraction method, with Lachlan if I suck on his dummy thats usually enough. with Riley nothing works and I'm scared I'll dislocate her hips wrangling her. so I now take off her nappy, let her have a crawl around, then put it on standing up. with night nappies I just do as many snaps up as I can manage then tighten later.
Oh I've also become a master at the crawl after the baby doing the nappy up at the same time