This bug report is for the 1.0.5-b77 version of Bonsai Trees with Forge 14.23.4.2739 (both latest at the time of writing this). Additionally, I am using OptiFine.

Breaking any bonsai pot, be it a hopping pot or not, drops 2 of the corresponding pot and sapling that were present in it. This seems to occur when breaking with or without a tool.
.gif file of the bug
FML log

Normally, one would expect to receive one sapling and pot after breaking a bonsai pot. However, the drops are doubled.