low beams/high beams??

Yeah, this is normal operation. On many newer cars, even the 05-09 Mustang, the low beams stay on when high beams are turned on. This was basically an improvement over the old High or Low method. If you are into a (little) electrical work, you can re-wire it so the low beams stay on when Highs are accessed. I haven't done this but will probably do so. Trying to set the switch so it stays perfectly in between both positions is wearing out my switch. Thats the lazy ass approach lol.