Yes, especially since I'm confused about your holes...
Gaps are A, B, C, D. Position numbers are defensive and a 2 is lined straight up on the guard. A gap is between the guard and center.
a gap is between guard and center.
2 hole us right side guard... same spot. should be train wreck.
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edit: now that I am at my destktop:
C----B----A-----A---B----C
---T----G----C----G----T
-5----3---1-----2----4----6
BTW - classic 2 hole is between OC and RG. There have been many variations. PSU used to number holes straight across from left to right if the play went right. But they would flip the numbers from right to left if going left. Some coaches do mark the Linemen rather than the hole itself as you stated. I think that became more popular with the advent for zone running. But, either way, the Left A gap to the defense is the 2 hole for the offense.
So, once again we see a difference in nomenclature. There is no universal standard - varies from coach to coach.
another edit: Re-reading your post. I think you might have been thinking of the defensive techniques for numbering. I was flipping the field on you since Lamar would run to the 2 hole (offense perspective) but Spillane the A gap (defense). Lamar would never run to the 2 technique. that would be silly unless he also plays MLB.