It seems like you have to scroll a lot to get to the product you are trying to make so wanted to suggest that anything you have made before automatically goes to the top of the list and if you cold also sort it by alphabetical order,etc for even more easy access. Anybody else finding a little but difficult? 

You don't need too use the list. Just enter the materials you wanna use. The list is there as a reminder. 

Whenever I try to 'use' the wrong thing in the list, like drying fish for example, I get nothing but 'trouble processing' messages and I never dry the fish.  If I do scroll through that ridiculous long list to find the kind of fish and then process it works.

Example:

I have a Trout, go to Processing, find Dried Trout, select, select trout from backpack, start, processes without issue.

I have a Trout, go to Processing, find Dried Sandeel, select, select trout from backpack, start, 'having trouble processing' (or whatever the message is) over and over.

Now that I've typed that all out...I haven't tried just adding an ingredient without selecting anything.  I'll try that later today.  Can you even do that?...IIRC, the backpack doesn't open until you select a recipe for processing.../shrug, I'll give it another go later.

You can open the backpack on any recipe known or not, I usually just open the pack on the first item (I don't know many! lol) and just select the items of the recipe I'm actually using and it works.

mine has trouble processing a lot its not because you didnt select it from the list it just fails now and again so it repeats the process. You dont lose anything if it fails just let it auto retry