I wouldn't worry about those having too much affect. They aren't long span nor too much area. Also the dihedral looks to be considerably more than normal for even a trainer. The plane is going to be very stable in the roll axis. Chances are good that it will fight your attempts to turn it with aileron/elevator. It will also have a significant tendency to turn when you yaw it with rudder. It appears to have more dihedral than rudder only trainers and rudder/elevator only trainers had in the early years of R/C.

If you have a picture of the wing when assembled, it'd be good idea to post that. You might discover a need to rig differential into your ailerons. It's actually not hard to do. I've been flying a number of high wing models that didn't have dihedral at all and flying them like a trainer, they all needed differential to even fly like a trainer. Significant dihedral on a high wing plane that has a cambered wing (flat bottom for example) makes the sucker turn in the opposite direction you're trying to turn it with aileron/elevator.

Got a picture?