Miscellaneous: Tradeskill combines resulting in multiple / stackable items etc

[Calabee]

in this example the fish eggs combine with xxx salmon + skinning kife in a tackle box. It yields 2 fish eggs, 2 fish scales, and returns skinning knife.

After trying to chain these combines, the items will get all buggy, says i cant combine anymore due to having the wrong items on cursor, but inventory appears differently...until you zone or camp, very easy to have item poofs or you drop them and it drops the wrong ones.