Need Advice... Master/Slave Failing?

Spaghetti999

Went for a hard 25 miles, 15 minute drive the other day
Noticed my clutch fluid was in the middle before pulling out...ive seen the fluid drop a year ago, and no problems since...so thought not much of it

25 miles later I arrive at my first stoplight...clutch pedal immediately engages right off the floor and does not come all the way up. I pull over, see clutch fluid is below the minimum level now. uh oh...
I fill it, and drive home just fine. Once home, same problem. Fluid is FULL after 25 mile drive back, BUT the pedal engages immediately and does not come all the way up again....

I checked the next 2 days and nothings changed, fluid full still. Cars been parked 2 weeks now, and pedal is fine now, and fluid is too. Only moved around driveway, have yet to road test....

Fluid has not been changed in my 2 year 26k mile ownership....it's dark.
Tried bleeding the fluid as a potential fix, the rusted bleeder valve broke off

How should I proceed? Is this correct order?
1. Bleed lines to see if problem is fixed
2. Change CMC if step 1 fails
3. Drop the trans..... if all else fails


130k mile car, previous owner changed CSC around 90k-100k mile mark when it left him stranded