Well since no one else is around who knows any details this is what I know. As little as it may be.
I don't know the internals but the pool went off on its own little tangent for a while. It effectively forked the blockchain I think. Maybe it lost connection to the other nodes?
I probably shouldn't have but I stayed in the pool & most of those blocks were found by me.
I don't know why but the height in the pool was left where it was so it didn't recognize any found blocks until the chain caught up a little while ago.
Edit: I got my wallet to sync by getting the 'addnodes' info from the LTC/BOB page on novaexchange. There's a link at the bottom of the page.
https://novaexchange.com/market/LTC_BOB/