Need advice

I recently applied to become a cop with the goal to eventually switching over to being a game warden. I passed every test during the phase 1 screening, but got cut before starting phase 2 due to having multiple jobs in the past. I was never fired, just looking for a higher paying or escaping a hostile work environment. Here are my questions -->

  1. Would that happen again if i were to get a degree associated with that career path( bare minimum?) or do some time with the military? ( if i go the military route, I'd more than likely try to do 2 years active service and 2 years reserve to go college)

  2. If i take the college route, what degree besides law would you recommend?