I extended the Blue Comet Lines by adding a lot of new world tiles with track, roads, and scenery but no interactives and no dynamic track, built as a separate route but then with the world and tiles copied into the original route. I went through the new areas and clicked on each track and road piece, and the vectors then showed up. I added speed limits, car spawners, crossing gates, platforms, and sidings. I visited all the new areas using Explore Route, noting and fixing problems. Finally I added signals and started creating activities, and when I started testing the first activities, I found that diverging signals would display red, and I could pass them by using the tab key and then I would have a 15 mph speed limit until the next clear signal. The one-head signals seem to be working OK. The same problem occurs in Open Rails, and Route Riter revealed no problems.
I went through the new parts of the route and made sure all diverging signals were properly linked, but the problem persists. The extension was created using the same signals, scripts, and configurations (mostly by Hank S.) from the original route. The route folder contains the script and configuration files dated 2011.
In the original parts of the route (from 2012), the diverging signals seem to be working correctly. I even tried adding a few new ones, and they worked correctly too.
I tried deleting a diverging signal in a new part of the route, clicking on the switch and on the track section where the signal was, then placing the signal again, but the same problem exists. (I back up my work daily, so if that had caused a catastrophe I could have gone back to the previous day's version.)
It appears that something in all the added tiles is causing the diverging signals to behave differently than in the original parts of the route. If so, what could it be?
Thanks for any help you can give.