Help New at this - HELP!!

Hi everyone, new to this so please bear with me.

Got the HTCH Cha Cha last week and there are about 3 or 4 numbers on my phone that, even though they are in my People contact, do not come up with their name (just their number) when they text. Anyone know how ot change this so that I actually know who is texting me when reading the message??

Thank you :)
I don't have an HTC, but I do have an Android based phone. Mine did that to some but not all contacts after I synced it to FB, Twitter and some of the other social apps I have. I just un-synced it. Not sure if that helps your situation.