Now that GOG unbundled the bundle (heh), how do we know the order of the episodes?
I had to go to the game's page to try and find it. Shouldn't it be described on the games library?

The order is this:

Legacy
Unbound
Convergence
Deception
Epiphany

MrDrWatson, I feel your pain! There are a few games that were unbundled on my shelf and I had to look them up on Wikipedia to find out what order they were released in. I shouldn't have to do that, GOG!

To make matters worse, Blackwell Legacy is sorted into the T's under The Blackwell Legacy, while the rest of the Blackwell games are properly listed in the B's. Why is GOG so inconsistent on this?

That's one reason why I sort my game shelf manually. I mainly do it to sort games by type, and now I have to re-sort it because the previously split games are now moved to the bottom.

Yes! Bring back manual sorting. I can't find games on my own shelf? What ridiculousness!!! That is why I have a shelf to organize my games, just like my books and movies, so I can put them where I want them, easily find and access them, and have it personalized and organized how I WANT IT. I can't imagine anyone not wanting to be able to sort their own shelves of items. INSANELY stupid, GOG.

Wikipedia is also you friend - https://en.wikipedia.org/wiki/Blackwell_%28series%29