Don't worry about what you see here. SDN posters are not representative of the general applicant population.
Your stats should be fairly competitive for most TX schools (your GPA is a little below the median for UTSW/Baylor, but your MCAT is pretty good). Just make sure you get some clinical experience / clinical volunteering.
Do your floor hosting duties for MD Anderson include patient contact of some sort? If not, you might want to try volunteering at a local hospital on the side.