I am having a terrible time with the hierarchy. I found the previous version of Spriter a bit glitchy, but version 7 seems worse.
It seems any operation I do within the hierarchy has unintended side effects. Drag-drop is inconsistent in this, every time I go to video it, it works. But here, I found something reproducible, at least: renaming causes two whole hierarchy moves. Watch:
The keyboarding happening here is F2 to enter "rename mode", then ENTER to accept the new name. Somehow that causes bone_010 and bone_007 to become part of torso, even though beforehand, none of the three are related to one another.