WTF did you say?

Well if the head was sent to a machine shop an they decked it, an checked it, an its good an your fans working, no air in the system, thermostat is working, then either you installed the headgasket on wrong, or your head wasnt shaved an its warped, ...sounds to me that its bubbling back because it has back presure which is caused from bad headgasket,warped head,etc