On your log, your last entry reads, "Bench with Chains 195 + 60 lbs of chains for 3 sets of 5"
How are you hanging the chains?
-from lighter chains, so that significant globs of heavier chain engage at some point in the motion, or
- fairly heavy chains hanging directly from the bar. That would mean a certain portion is part of the weight at the bottom of the motion; as the bar rises, the weight increases.
I've had success with bands in the squat, chains in the Romanian dead and my back-off dead sets, but I've probably gone too heavy with chains in bench.