Les, you should ask for a refund on your copy of UVMapper. First of all, it splits UV islands along material boundaries, which I think it shouldn't (unless that's an option you've switched on on purpose). Second of all, that extra polygon does not show up as belonging to the tongue material in Wings. I tend to trust Wings in these matters, but if you insist, I can run an independent script on the obj file that splits it into separate files, one for each material.

-- I'm not mad at you, just Westphalian.