While I find such installs to be -> electrically correct <- you encounter installers that either don't know that there are pairs in the wires or that the pairs are not 1,2 3,4 5,6 and 7,8. I will not reveal the correct wire pairs here because I want to hear it from the installer. That gaffe happens so often it's not fun to hear/see again and again.

What makes it harder on everyone is when folk want to know why it works or not when the wire pairs are not correct or with specific hardware. That would take a deep inspection of said gear, sketching out the wire pairs and well, who is going to do that?