Okay so I bleed coolant system really good. I drove the car for about 3 days and gradually the heater would start to feel not as hot from burning hot for a whole day. Its like the system is getting air in it what would cause this? If I bleed it ever 3 days it will keep fire hot heat and not try or attempt to over heat as long as I'm keeping the air bleed out. Thanks
Also I use Billman's bleed method as I think its the best way.

 

Are you leaking / losing any coolant in the process?

 

It isn't at the neck no more I checked it and done compression test just now my numbers were
Cylinder One- 210
Cylinder Two- 200
Cylinder Three- 190
Cylinder Four- 188 almost 190

Bad or Okay?