Issue with totals is a bug but not sure if PayPal or my stuff. Does PayPal have any errors in the IPN History area?
Do you see the donation that has been created or does it not add at all? Not at all.
Time off by 5 hours is really weird, I use the same date methods as the rest of XenForo so that could be a timezone issue elsewhere. It's weird for sure I thought I was losing my mind because I'm pretty sure it worked before I updated it, but I can't say that for sure because I didn't have it for very long before the last update.
There is a calculation with the custom amount to be based on all the other amounts, I have been meaning to tweak it. How would you like it to function? Just blank at all times until it's ticked and fillled in.