This is a interesting result when there already part editor cuts, then a bottom insert is applied to the bottom of 1 end,
It seems to be the same for unconstrained and constrained cuts
Also if you have constraints applied and you try to edit them in the Constraints manager it doesn't work properly
Its probably not a very common scenario, and when you think about it gets complicated whether the kick should just be removed from the bottom if there are no restraints, or remove the cuts then add the insets or other scenarios.
We have seen this issue, and it will be corrected in the next release of eCabinets. The next release should be coming shortly, as there are other issues we need to correct. Thanks for letting us know though.