I say if you had someone else "fix" the slave and master already...take it back to them and have them make it right. It sounds like something may not have been seated properly if you are still losing fluid or you might have gotten a bad part. I replaced my slave not too long ago and still got no pressure on the clutch. Come to find out, it was a bad replacement part and I had to go through it all over again! Good luck!
"If you can't be good, be good at it!"