A. 65% is actually a good RH to stick with. I doubt is was the moisture that affected the draw on that one cigar, but I've found that with temperatures being higher these days (my humidors in the office and at home are averaging about 73-75 degrees), even at 65% RH, some cigars tend to get a little soft.

Note also, that after leaving them out overnight and finding some cigars firmer than others, that just means some cigars were more moist than others.

My advice would be to move the humidor to a cooler part of the house, or let the RH drop a couple of more points and see how they fare. That's assuming the temp is 73 degrees or higher.