I have been searching for hours and it only caused me to be more confused. Say I was concealed in the beginning and made a range sneak attack, could I move to another area with cover, then make a stealth check in the same turn? Or does it require a 2nd turn to move and stealth, then a 3rd for a 2nd sneak attack?
Ranged attacks from Stealth are an exception to the normal rules governing Stealth.
You can only move after making a stealthy ranged attack if you do not plan on making another stealth check. The reason for this is in the rules for the Stealth skill below:
If you decide to make a ranged attack from stealth, you may either 1) re-stealth immediately afterwards (as per sniping) and stay where you are or 2) move to another location and remain 'visible.' To do both would interfere with the action economy of your turn unless you have some means of taking another move action.
Note: Some may argue that a Stealth check is normally a non-action and is made as part of a move action. This is true for normal stealth checks but not those governing stealth after ranged attacks. The rules change if you're sniping, so you could not shoot and then move to another location, making the check as part of the move.
If you were making a melee attack, though, Stealth would work as normal and you could attack, move, and re-stealth (as part of the move) all in the same turn. Though you'd take an AoO for leaving a threatened square as you are no longer undetected.