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i cant really see what the problem would be off-hand. any possibility of attaching a test file?
with unwanted transform nodes being created, its a transform information that needs to affect an object as so it can be where it is, but cannot be placed directly on the object it is (eg, separating a poly mesh will create a transform node plus the new meshes, so its history can be edited), hence one of the ways to remove them is by deleting its history (edit -> delete by type -> delete history), however it is recommend you not delete them unless you understand why they are there and whether you actually need them or not.
the reason you aim constraint outputs unwanted/wrong info could be a number of things, could be a dependency loop, a wrong pivot, aim constraint setup incorrectly, so again an example file (or video) would be helpful.
i believe the reason for the unwanted transforms, could be if the object you are parenting or “mounting” is unable to append the new transform information to its own transform node (its attributes could be connect or constrained or even locked - however if they were locked, you wouldnt get the extra transform node, it just would move to a different place)
someone else might have a better idea or understanding of what the problem is though.
Lee Dunham | Character TD
ldunham.blogspot.com
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