Some sites not showing on Network theme

Hi, I have the Network theme installed on 3 MU installations. On 2 of them, they are not showing all the blogs. The 3rd one is ok. One is missing 1 blog, the other is missing 2. My settings allow for that many, plus some. The missing blogs were being shown until recently. I don’t see a way to force the post indexer to update. I have authorized support access.