Not sure if it's possible or not to get a XLT with black bumpers like that without swapping them, but it's also possible that the emblems were changed out. Sure looks like a XL model to me.
I could see some guy with a XL model looking for emblems on eBay that have XL on them, seeing XLT ones, and thinking "close enough" or forgetting his truck is XL instead of XLT. Just an idea to consider.
Do you have any original paperwork, window stickers, etc.?