On my agile, when I set the action to low, it buzzes in the 1-5 frets, while the rest are still to high from the fretboard. So I adjusted the truss rod to give it a little bend forward so I could lower it a bit more to my taste, is this a bad thing to do?
Only if you adjusted it too much in one go. You're supposed to only turn it a little everyday. The fretboard needs time to adjust to the rod change.