I know exactly what your talking about Mbram. Its not your breathing technique or anything else your not doing right; your reg just breaths a little too easy. It probably flows air pretty bad when you remove it from your mouth at depth. Just find someone who can adjust it slightly.
kac215, thanks for the advice. I took the reg in to the LDS and told them what was going on and they fixed it. No more bubbles out my nose or air being shoved down my throat.