So I'm just in Flotsam, but I already have a ton of crafting recipes, and it's difficult to find things when I'm trying to craft. I really wish I could sort my inventory lists somehow, either alphabetically, by category (bomb recipes, potion recipes, etc) or ideally both. Is this impossible, or am I just missing something?

As far as I know, there isn't an actual sort button. There are, however, category filters for every type of item in your inventory. Just look at all the small round buttons right above the inventory list and you can filter for bombs, potions, recipes, crafting items, armor, weapons, books, etc.

Any way to check what ingredients you need for the alchemy potions? Really confused with the gamepad menus.

I appear to be missing one item for crafting of the Mongoose potion but I can't for the life of me figure out what it is.