@AHarper , go to the Beta version link that Yooper provided a few posts back in the thread. Log in and open a recipe that you haven't saved using the new nonsensical version. You'll see that your inventory items will populate into the drop-down just as they used to do and ingredients sort properly and custom fermentables in inventory look just like any other ingredient in the calculator.
My plan is to only use the Beta version for recipe calculation and never save a recipe with the current calculator. The Beta is actually the old version (at least in that aspect) and the new version went live with hundreds of problems. I suppose that the new issues are resulting from changing code so that fixing one glitch is causing a cascading effect to make new issues.
It's a mess and it's a shame.
I used to really sing the praises of Brewer's Friend to my brewing acquaintances. Now I don't recommend it to any one, ever.