|Carlos Robledo Venture-Lieutenant, Georgia—Atlanta aka CRobledo|
There hasn't been auto-leveling as you describe in PFS for years. That was false information.
What you ARE allowed to do is to play one of the Pre-generated characters that Paizo offers to its players. There is a pre-made character for every class in the Core Rulebook now at levels 1, 4 and 7 (meaning that you should be able to play at any scenario offered, and even in-tier [except for sub-tier 10-11]).
What you do is if you find that the next event is running a game for tiers 5-9 (meaning you need a character that is 5th through 9th to play), then you can snag one of the level 7 pregens from this site and show up to the game with that.
Yes, it's not YOUR character, but I'm sure you can find something mechanically close. Not only that, but at the end of the game you are allowed to take that chronicle sheet you earn with the pregen and even apply it to your existing real character either (a) when he himself gets to level 7, or (b) immediately with the gold reward reduced if he is still level 1.