The stock-at-a-time field needs a default you can set in the main settings, so you don't have to replace 0 on every single one. Preferably you could leave it blank to use the default, and enter a number to use something specific.
On a similar note, it would be great if stocks came with a default name based on their content. You could override it, but if you didn't it would set a name that describes the filter on that stock. This is more important now that you can direct stocks around by name... better names than 'Stockpile' are tedious to do all the time.
Raw Stone (all types of raw stone)
Some Raw Stone (excluding Raw Marble)
Raw Basalt (just Raw Basalt)
Blocks & Tiles (all types of Blocks and Tiles)
Some Blocks & Tiles (not Marble Blocks)
Some Stone (chisels, knife blades, knives, sawblades, hearth, mold, furnace, trough; rather than list them all, it just says 'some types of the Stone category)
Some Wood & Some Stone (add looms, bed frames, and other wood parts to the above)
Some Goods (add Anvils, cutting wheel, file, wrench from the metal category, and it bounces to the parent category)
To keep the names unique, adding the level and unique identifier could help.