It strikes me as rather odd I can level up to Dragon smithing, but can’t put an additional point in to get a Daedric bow after that when I reach 100. I haven’t tested if I advance to the right if I can get Dragon after leveling to Daedric, but I would assume not.
If this was intended they should really have left them as two separate trees, like horns or something, not a loop that is connected and gives the misleading impression you can take either path to fill them all.
I had to use the console to add the perk manually once I “qualified,” then again to remove a perk I had spec’d in to simulate not using more perk points than would be available at my level.
I’m sure mods will address this, but I just thought I’d mention it.