My answers were meant for the OP.(sorry for the confusion)
I read through your 1st post,and assuming that your trans is full of fluid,I'm guessing your clutch is bad.Other people driving the car is probably the biggest reason for the clutch problems.
On to post# 2
[quote] The clutch releases almost all the way at the top - like within one inch of being fully released: That's when the car moves. Just like a properly tuned clutch. Is that what you mean?[end quote]
The OP's car has a slave cylinder,and that was what I was referring to.
First thing you need to do is check for free-play in the clutch pedal.To check for free-play,lift the clutch pedal up against the pedal stop,the distance the pedal moves upward is the free-play.There should be about a 1/2" of free-play in the pedal,if there's not,it should be adjusted.
If this doesn't cure your problem,it's probably time for a clutch.
Oh almost forgot...A properly"tuned"clutch doesn't release a inch from the top,but a clutch that is worn,or miss-adjusted does.