With a new demo releasing soon (trailer below), the boards will be reset once this new demo releases, due to the old version likely no longer being widely available past that point, and generally the aim to is eventually track the final release, and only the final release, whenever that may come out.
That, and the person who originally made these boards likely assumed that the Alpha Release was the last, due to the project being abandoned at one point, which was fair enough at that time.
We could as well separate the categories into The Alpha Demo and The Full version so those who had run the Demo wouldn't have run it for nothing. We could as well instead put them into ILs categs. By that I mean making separated world categs in IL and leaving the Full version in the Main Categ.
If the Alpha Release had some true historical merit, I would agree with you. Since it's two levels (and future releases will have these levels ingame), though...I'm inclined to think that it isn't worth keeping.
I'd rather not cause too much confusion with ILs as well.
I would create two categories personally and then delete the first demo when the Demo 2.0 starts having a few speedruns
I have made boards for the new demo as well as the IL table. The old board will be removed on October 5th.