I've tried changing the padding to add time on multiple football games this weekend and the client will say that the padding has been changed, but if you look at the padding in the web admin interface it doesn't show anything. Changing it there fixes the issue. I haven't seen this issue on the Apple TV client. I had at least one recording with no padding that I missed the end of because of this.
I'm doing this from the scheduled recordings section and these games were all scheduled manually from either a football search or the guide, not with a pass. Latest 8/25 beta.