Nope, sorry... you can only promote by one level each season. If you win a couple more times, though, you'll get there :-) Same with demotion... team 8 in each conference, and the losers of the L5vR6 and L6vR5 are relegated down a league.
Thanks for clearing that up. ;)
BTW, I think you mean L6vR7 and L7vR6. :P