Be aware: credit karma provides a FAKO score, not a FICO score. This is mostly totally different from your FICO. But your scores will go up, once the cards age.
I went on credit karma it said my score was 591 I was a 663 2 months ago I app for cap1 cash newcomers $500 and credit one $300
Wal-Mart $400 3 weeks ago I paid my other credits mostly off owe a little left and 2 cards not reporting yet and wanted to know when dose my credit score go back up 12 inqs 3 inqs are 1 year in 1-20-12 !!!
It sounds like you need to get over to the Garden Club in order to build your score. You have nice new cards, but with that comes starter limits, inquiries, and low AAoA. The only thing that will fix all of that is time. Come on over to the Garden Club, ask for soft pull CLIs at 6 months, and otherwise just enjoy your new cards and making every payment to build positive history.
I agree, you have a few months left before that score is going to rebound back to where it was. But you can do it!
+1 Get to the garden!