One persons "tap" can be another persons "push and hold" . . .
Either that or the damn thing is broke.
I always use to have the same type of problems - never getting that nano-second push, depress or hold just right on any of my headsets. Just never knew what the thing was going to do, so I gave up and just used the phone buttons to end calls, etc.
Currently I am using the BlueAnt V1 and just got the latest greatest Q1. Love these as they talk to me and accept voice commands. Example: a call comes in - it tells me who is calling and asks if I want to answer or ignore. I simply say answer or ignore - no pushing any buttons -
Ron