Description:
Whenever you enchant a Skyroot Poison Bucket into a Skyroot Remedy Bucket in the Enchanter, an Empty Bucket gets left behind, practically duplicating the Skyroot Bucket. (See image below.)

My bug report on the issue: gildedgames/aether-issues#739

The reason this can't currently be fixed:
Even though Aether Legacy has received further updates to fix this, Tinkers' Aether doesn't work with these versions. If Tinkers' Aether gets updated, I can update Aether Legacy as well, fixing this issue.

Workaround:

Keep your free Skyroot Bucket.

resolved via DJ2 Addons in this release: https://github.com/ByThePowerOfScience/DivineJourney2Addons/releases/tag/v1.2.0-release