Sounds to me as if you have;

1. Air still in the system

2. Upon breaking the rubber hoses are old and worn out letting them bulge

3. Your MC is fubar and needs to be replaced.

I do not quite understand what you mean when you say "my brakes are slipping".

David Fritzsche
1990 Ex-Cab V-6,5-speed, with a few mods
04.5 CTD Dodge 2500 Ram--Tow Rig
Roseville, CA

"Serenity through Sobriety"