Reported Issue: Remote FOB works intermittently
Situation: Remote locks doors fine but have to press unlock several times to get it to unlock the vehicle, same with the remote start button
Possible Cause: Beside's at least trying a fresh battery in the remote, the remote definitely sounds like it's just wearing out and you need a new replacement. Could try taking the remote apart and spraying a little electronic circuit cleaner over the push buttons on the PC board might help if its due to dirty pots.
Possible Fix: Purchase and program a new remote.