There was a bug in the donation system for a while. It could happen that the tournament donations were correctly saved, but lost if the tournament data got edited.
I ask all organizers to check their donation selection. For past tournaments: only an admin can correct the issue, so just drop me a short message.
I'd like to remind you at this point, that we're also verry happy about donations not linked to the tournaments. The new server just cost us almost 200 Euros (~ 300 $) and that wasn't a planed investment. So if someone thought about a donation... now would be a great time.