You're charging from too far away it seems. When I ran a warrior and 4 druids I would charge at almost the minimum range so my 4 druids following wouldn't stop. Once I charged you simply run forwards through the enemy - which turns the mob around facing you - and wait for your pally to catch up and hit the mob from behind (or the side).

But I always had issues where the mob would reposition itself randomly, which was incredibly annoying. After a while you'll get used to it, and it'll become second nature constantly positioning your melee characters. Once you get the hang of it, melee teams are a blast.

If I still had wow accounts active, I could easily demonstrate what to do....

If I were you I'd have the pally as the main and have him run towards the mob, then have your warrior assist your pally while you're running towards it, then smash the charge bind on your keyboard and your warrior will fly towards it and start autoattacking while you're controlling your paladin and catching up with the warrior. Make sense?