Edited Post Date and Crawlers
As I try to figure out the non-targeted Adsense ads on my site, I am learning new things.
I thought I made it through the weekly Adsense crawl without being blocked, but it got crawled by Adsense yesterday and there it was blocked again 
. As I looked more closely at the blocked URL I saw that it was for a post that was post dated for the next day so it was blocked. I did some further research and found that there is a way to allow the Adsense crawler access to password protected pages. I found it here on the Adsense help pages. So now I wait again for the next Adsense crawl next week.