My husband has dementia and is now in diapers, especially at night. I also have pads underneath him. Some nights the diapers work beautifully but some nights the pads are wet, his t-shirt is wet and the diaper is almost dry! I check the elastic around his legs when I put the diaper on but figure I must be doing something wrong or I wouldn't be getting this outcome. I buy the best quality diapers I can find and they seem to fit him perfectly. I can't figure this out but maybe someone else can. Any suggestions?
Also, https://www.diaperbuys.com/ has an "ask a nurse" section. I've not tried them for advice, but maybe they can help.
I would expect similar results with men needing diapering. If he is adjusting or even if he is getting an erection during the night that can change the position and lead to leaks.