Enforcement of Illegal Touching By an OL

[foureyesallbad]

Last week, I had to white hat a jr. high game (NFHS).

A's ball 1st and 10 at their 40. QB is in trouble and dumps it off to A60 (hits him in the back) at A's 36. The penalty is enforced from the spot of illegal touching A's 36) since it happened behind the basic spot, which is the previous spot (A's 40) on a loose ball play. So now it's A's ball 2nd and 19 (loss of down) from their 31.

I had a coach yelling that he was an official for 10 years and that was the wrong enforcement. I just needed to confirm this.

If you can, please help. I'm new at this and I live in fear that I am missing something.

Thanks in advance.
4eyesallbad