Is this really neccessary? I want the almanach to show guns, not itself, when researched... It's kinda stupid if its shows itself since it's of no consequence (same story with the data disk).
The game was simply designed this way. You get the topic you have researched plus one free topic. There is no option to get only the free topic.
It doesn't crash anymore, so it's not absolutely necessary... until someone finds another crash somewhere else.
There will just be a small confusion that clicking on Previous and then on Next button doesn't bring you back to the same topic... caused by the game not being able to find an index for the non-existing almanach/disk topic (yes, game tries to open it, even if it doesn't exist).
As already explained somewhere, I could rework the whole research system to actually be consistent... but it would break all mods and vanilla too... so, yeah...