I'm thinking that possibly when you remapped it, somehow the group names in the obj file became renamed or were lossed completely. When a cr2 loads an object, it only loads the geometry for the body parts that are referenced. Open your .obj in a text editor and look for lines that start with a 'g'. The 'g' should be followed by the group name. For a tanktop you should see the following groups:

g hip
g abdomen
g chest

and possibly:

g rCollar
g lCollar
g neck

You should check to see that the groups are still named exactly like above.

Hope this helps.