I have two objects, and in UV Mapping, one has a value of UVTex, while another has UVMap Whenever I try to join the objects together, the UV Map is entirely messed up, to the point where all of my objects' faces are one vertex.  Should I not join the two right now, and do it later, or should I find a way to get the value to be the same for both.  If someone could give me some advice as to what to do here, that'd be great.  Thanks! (I use cycles render.)
I had this issue before. Rename both UV maps (on the mesh properties panel) to have the same name, then join (ctrl+j) the meshes and both UV maps should be preserved.