If increased balances on your CC's is the only cause for the 21 point drop in your scores then you will get those points back when you pay off the CC's--barring any other possible negatives that can/may happen in the meantime.
Good luck with the home purchase!
Current: EQ 660 March2013 / TU 696 April2013 (Walmart)
Start: EQ 584 Feb2012 / TU 629 July2012
Wallet: Discover It $1000 / CapOne NHRC $1500 / CapOne Platinum $1500 / eBay MC $2000 / Orchard $400 / Amex Zync $500 Autopay / Walmart $2000 / Amazon $1000 / Lowe's $1500 / JCP $2200
