We had rarely shipments of definitely mixed species (as it seems to be here). The problem are the females. As the males are concerned, waiting for some weeks mostly will reveal the species or at least to group (in case of bintan-like forms). But if there are indications that they sold a species-mix, we are hardly able to recognize the right females. We don’t know what the males are able to. Therefore, it is possible that hybrids have been already swimming in our tanks.
If you come across a mixed group, you must be very careful. By no means offspring of such fish should be traded any further. As I said, the problem are the females. Luckily, we rarely encountered mixed groups (and hence possibly mixed pairs) in fish from Ruinemans’ or Glaser’s. But in your case this might have happened. The mistake most probably was made in Asia already by the catchers who delivered their fish caught at different places to the exporters by putting several weak caughts together.
I should draw the conclusion that we must try to become better in discernng the adukt females of our Paros. There are differences, but less prominent than with the males. We need good photos of clearly determined females.