Default [Q] m7att but can only flash m7ul?

My HTC one is bought from at&t , and I unlocked it with custom recovery and custom ROM yet I received all that by flashing m7ul roms and recoveries not m7att... My phone works completely fine but I can't seem to flash anything intended for m7att it just says my phone is m7ul
Is that a problem? I'm super curious..

Sent from my HTC One using xda app-developers app