Normally those little 'do you really want to do that' checkboxes annoy me but I've just accidentally cancelled a sponsor (again!)
The problem is that if 3 of the 4 are due renewal then the link on the left is renew,the one that isn't renewable has the cancel on the left and it's easy to click them all losing a sponsor in the process.
Suggest either have a 'do you really want to do that' checkbox when cancelling and/or have a placeholder so cancel and renew are always in the same place.