I just created and exported a single element from one of my sites (tco) to another site and instead it exported every page from the first site to the other. Lucky the site I was importing to was a staging site or it would have been very bad.
Seems this is happening elsewhere too Pro 6.4.13 can’t import exported tco files - Support - Themeco Forum
OMG it’s getting to the point we have to create staging sites for every single theme update! always something???