Taken from Dave Mech Cheatsheet
Query 1
Erase Lock (prompt) appears but the parameter lock remains on the step.
Try a simple 16-step pattern and overdrive it (under AMP menu 2), then press no and the AMP page encoder while sequencer plays. The prompt appears but the overdrive parameter lock still shows when you press a step.
Query 2
Latch yes but I could not gel Cue Fill nor Latch Fill to work.