Once you explained the first picture, I understood what you meant. The front on the other hand seems fine, and the black leather tab, the embossing is good too. I guess at the end of the day, if it doesn't bother you, and you absolutely 100% love it then you should keep it. They are definitely hard to come by, and apparently the waitlist in Sydney I heard is now been closed for a while as there are too many orders. The reverse monogram mini is even more rare and harder to come by. I got the mono mini PS when it first came out, and I absolutely love it. I love it so much I was even contemplating getting the reverse as well, but my husband said I was nuts!! lol but even if I wanted too, it is not available no more. I did see th reverse around 6 months ago, but at the time did not want it.
Nonetheless, please think carefully, coz you have to use it at the end of the day. You have to be happy with it, coz it's definitely expensive for such a small bag. And then it you let it go back, no regrets just in case you never get one again. Good luck and keep us posted on what you do.