Improved grapple states:
Benefit: You do not provoke an attack of opportunity when performing a grapple combat maneuver. In addition, you receive a +2 bonus on checks made to grapple a foe. You also receive a +2 bonus to your Combat Maneuver Defense whenever an opponent tries to grapple you.
The part I have a question about is: "you receive a +2 bonus on checks made to grapple a foe" does this include the check you make every turn to maintain your grapple?
Follow up question: enhancement bonus don't apply to grapple checks, correct?
Thanks!