Adjusting tracks on CDJ

I try to prep all my tracks to the best of my ability in rekordbox.

Sometimes, while DJing I realize I want to set a new memory cue or adjust the grid, which can both easily be done on the fly on the CDJs.

My question is:

After the gig, when I return to rekordbox and plug in my stick, will my new cues / grid adjustments overwrite the originals in rekordbox automatically? 

or—

Will rekordbox revert my track's original settings when I sync my stick the next time?

I've tried to check in the past but my library is so big it's hard to remember which track I needed to change on the fly.

Thanks!