It's fine, I took the plans even sharpisher than you took them back
I knew most of them already, so that's why there were still a lot left afterwards. I've spent tens of thousands on plans and I've scoured the world for ~120 hours for plans and recipes, so there aren't very many I don't know.
Since the latest patch, my challenge count of learned recipes has move from 4 to 10...although I've learned dozens. Maybe the challenge is actually to learn 76 recipes involving bugs, since Bethesda is so fond of bugs
Shame about the holotape not registering as you finding it, but I suppose that's not a bug. Have you tried playing it? Maybe that will work and if not you might find it a bit of nostalgic fun. You can quit Wastelad and return to the same place, so you don't have to do it all in one go. I had to do that a few times to eat and drink, especially drink.