If you're shooting with a canted bow, you're shooting instinctively, I would guess. At instinctive shooting distances (10-30 yards), you might have better luck shooting with your middle finger touching the corner of your mouth rather than your index finger. Shooting instinctively, you probably shouldn't worry about where the string is in relation to your eye; with the bow canted, the string and the bow should just be out of your way. It is a good plan to have your dominant eye over the arrow, but the most important thing is to have your head in a comfortable position that is not forced, so your head ends up in the same position time after time. Then after you have shot enough arrows, your brain will compensate, and if you miss to the right or the left, it won't be because of an aiming error.
These are the things you should worry about in instinctive archery:
1. Focus on the target.
2. Push with your bow arm.
3. Back tension (get your string elbow in allignment with the arrow at full draw, not sticking out to the side or up or down).
4. Get your shoulders square with the target (see Terry's clock numerous places on this forum). Having your shoulder pointing to the left of the target is a major cause of missing to the left.
5. Have fun!