I'm not sure about the points not changing but white lines indicate there is some track that either didn't install or is faulty. Since none of the content is truly faulty - I haven't seen any errors or warnings in CMP - most likely either a CDP file didn't fully install or there was a glitch. The short answer is to open CMP, find the Maria's Pass route itself and look for a yellow puzzle piece next to it. If it's there, highlight the route and select View Dependencies, then select View in Main List from the window that pops up. Then, highlight everything in the right pane and select View Errors & Warnings. Most likely, that will clear out any errors, but be on the lookout for red exclamations or yellow or red puzzle pieces in the dependencies list.
Tip of the month: Avoid buying Trainz on Steam, especially if you intend to gift it. Apart from the game differences, Steam keys are not the same as CD keys and will not work!