I see the nuts below in the last image that were not visible in the first image.

Please do File Archive to save a .wbpz file and attach that to your reply along with a note to say what version of ANSYS you are using so I can take a look at your ACP Pre model.  If you still have the original model that was built in one direction, and not from the midsurface, that would be interesting to see the .wbpz file also.