As a fellow lefty, I hope the friend gets his issue resolved with Tenicor. They're the only ones who can address it.
Having said that, I find it odd, as there are some differences between the left and right versions of the holster in these pictures.
On the molded belt area, the one on the left has three holes and four slots; the one on the right has two holes and four slots. The holes on the right one are on two "bumps" under the slots; the one on the left, the upper left hole is made on one of the slot bump outs. So it's not like the mold used for the right was just "flipped", it's a different shape.
The upper slide insertion area on the left one has a ramped indentation, the one on the right is square all the way down, and then it assumes the shape of the holster. As is they were molded for pistols with two different safety levers or mag releases or something?
These are pretty subtle differences but it doesn't look like the one was meant to be a mirror image of the other (which is what I normally find when buying left hand holsters. Usually the attachment mold area is shaped identical, since the clips/loops are identical.
Just seems like there is something else going on here. I do hope the OP's friend gets this figured out, however.