Look,
all I was saying was: if a pilot is descending (or climbing) to make a level restriction, then issued with a further descent/climb why would they deliberately not comply with the previous restriction?
ROGEROUT - please don't be sarcastic. My point wasn't as simple as "use common sense". It was part of my viewpoint.
You are right though, one clearance does cancel a previous. But I'll tell you this - I'd bet a fair amount of money that the majority of us don't always remember to restate clearances when we're working hammer and tongs.
GW