As you can have links in the forum description, I suggest adding links to the TTDPatch and OpenTTD suggestions there, to hopefully make clear that people are about to select the wrong forum and point them to the correct place instead. So for the Transport Tycoon Deluxe forum, the description could be changed to "Talk about the sequel to the original TT, Transport Tycoon Deluxe. For TTDPatch go here and for OpenTTD go here instead.".
For the problems section, something similar can be done: "Problems with Transport Tycoon? For TTDPatch problems go here and for OpenTTD problems go here instead.".
These two sections consist mostly of moved topics and this is an easy fix to reduce this phenomenon. No need for any automatic movement
