Need help with PaidRanks plugin

I'm making a drug server and PaidRanks seems to be acting weirdly, this is what rankprices.yml looks like

http://pastebin.com/gDj4iiti

If you /rankup, it will promote you to Grower, but if you rankup again, it will go back to default, and then if you /rankup again, it will skip a rank and go straight to Cooker, skipping entirely the previous rank.

So it goes like this:
default, Grower, default, Cooker, default, DrugLeader, default, DrugLord, default, Boss

Instead of:
default, Grower, Dealer, Cooker, Distributor, DrugLeader, DrugBaron, DrugLord, DrugPresident, Boss.

Does anyone know how to fix this? If you don't get it, post a reply to this thread so I can PM you the IP.

Thanks!