It's kind of hard to troubleshoot your specific problem without knowing specifics of mic positions/distances (from each other and the walls, floor, cieling...) and a host of other factors. The fact that the kick is more prominent after you've burned the mix might indicate a cancellation of low frequencies at your mix position. Again, it's hard to know without being there. It doesn't really matter, because the fact is you don't like the sound you're getting, so here are some suggestions.
Try moving the drums to a different part of the room (this won't cure room nodes/comb filtering, but will shift the locations of nodes/cancellations - hopefully away from your mics). Try moving the mics relative to each other (you could have a great sound on the kick mic only to have it sucked away when you bring another mic ointo the mix due to phase differences). Try inverting the polarity (often called flipping the phase) of the kick mic, as this will change the phase relationship to the other mics. Check your mixes on a good set of headphones - not so good for checking imaging or ambience/reverb, but great for checking EQ/spectral balance without having any room monitoring anomalies.
I know this sounds like a lot of work, but good, no, make that great, recordings take a lot of work
Scott