Sounds good.
It's possible the other sites didn't clear. I mean, this was a quick, heavy thump of a lot of snow. The other two sites could have had a few inches of compaction while you had a clean slate to pile up another 10" with.
Still waiting on a part. That sucks. I always feel like death after the first shoveling of the season. Right now I feel like I could do another 2 driveways.