Whats the proper way to export/import between Matinee and Maya?

I’m running into a problem when exporting all from Matinee, editing animations in Maya and importing back into Matinee. Here’s an example:

Exported from Matinee:

I animate a chair to move straight up (starting at its original position) along the z-axis, import back and get:

As you can see the x and y coordinates gets messed up somehow. I’m guessing this is a common problem with a simple solution, but I couldn’t find the answer here.