I was unable to open your fdt file as there is an issue with the material definitions when opening in the newest products. Unfortunately the 32-bit product is quite out-dated and not supported.
Without seeing your design I can speculate on the issue you are encountering and the confusion regarding what you are reading. The limitation at this time with tilt is not in the input plane but instead in the boundary conditions. Currently the periodic boundary conditions require symmetry both in structure and in field which is not the case when you tilt. The measurements you are looking for can be done without the use of PBC with careful setup of your design.
In order to move forward I would recommend you get an evaluation copy of the latest product.