This might be intentional, but I still should report it just in case: Whenever I run the /slab command, I only get half the amount I would get if I put it in a stonecutter or if I crafted it (e.g. 32 stone blocks turn into 32 stone slabs when stonecutter yields 64).

Again, unsure if this is intentional or not, and if it is intentional, I'll file a suggestion