Your attorney is right!
http://www.uscis.gov/portal/site/uscis/menuitem.5af9bb95919f35e66f614176543f6d1a/?vgnextoid=48c78976a0a77310VgnVCM100000082ca60aRCRD&vgnextchannel=e7801c2c9be44210VgnVCM100000082ca60aRCRD
1. You are safe (within cap)
2. USCIS processes on FCFS basis
3. Wait for your receipt and petition approval (or upgrade to premium processing to expedite the process)