In addition, the Hickory Street CNW crossing by the Land O' Lakes mill has been replaced. The HP Trains crossing does not play well with TRC. Any of your trains starting ON the crossing should be moved to safety nearby in version 7 before you install version 8, and put back after.
I think I've done all I can on this route and the sessions. It'll be put on the DLS in the next day or two. Then I can go off to some quiet place and try to regain my sanity.