I can't get past the tutorial part when double-tracking the Washington station. I doubletrack where the green arrows are, and I lay track to connect it to the main line, but it's still not continuing with the tutorial, like I haven't done anything yet. It's clearly connected, but good ol' Sid, who wasn't around to provide tutorial voice-overs like in Civ4 apparently, doesn't think I've connected it to the main line.