I'm still trying to figure this out. The above reply was mistakenly made in the wrong thread.
I have the new interval set to 10 days on one site. It's adding the new tag all the way back to April 22.
On another site it's also set to 10 days. It's adding the new tag to sites dated March 10.
Both sites were "built" today. Someone mentioned "dynamic mode". The only thing I could find on that was "dynamic_pages" in the build options. It was set to yes. I changed it to no. Still getting the same number of sites with new tags.
I have the new interval set to 10 days on one site. It's adding the new tag all the way back to April 22.
On another site it's also set to 10 days. It's adding the new tag to sites dated March 10.
Both sites were "built" today. Someone mentioned "dynamic mode". The only thing I could find on that was "dynamic_pages" in the build options. It was set to yes. I changed it to no. Still getting the same number of sites with new tags.