Males will sometimes lock with Males.
I recommend taking it to a good breeder or vet to get it sexed. If it was sold to you as a male I think it's probably a male because it's rare for males to be mistaken because once you seen the peens, you know it's a male for sure.
You sure that normal male is a male?
It doesn't look very big.. and if it is a female, it could be too small to breed. I recommend you get all your snakes double checked by a good breeder or vet before pairing anymore. Combat with males isn't recommended because they could hurt each other with all the shoving around the enclosure.