I interviewed with another company after this and they offered me class date, does this mean the termination letter did not show up...or was I gonna get booted out of class when they eventually received it?
Your employment was "terminated" by your resignation letter - you're worrying too much.
Trust me - more than half the time this was the term we saw being used when we ran our pilots' background checks.
If you're uncertain - contact John Ryan at the FAA [email protected]