I think this guy actually has a legitimate complaint this time, compared to some other reviews that have been posted here. I may have read his post incorrectly, but it looked like he said Luxire asked him to pay for return shipping AND pay an additional $20 to have the issue corrected. OP can correct me if I'm wrong on that. If that is the case, it actually seems like bad business on Luxire's part, and it goes against their policy. If Luxire made errors on the shirt (which it definitely sounds like they did in this case), the customer shouldn't be expected to pay for anything other than return shipping.
If that's the case, that's one thing. The charge though makes it sound like there was some change from the order.