IPC-2581 is still a relatively new format that can be outputted differently by each PCB/EDA tool due to slight variations of interpretation from the IPC-2581 standard.
As the format begins to evolve, our goal is to perfect IPC-2581 importing and exporting. If you happen to have any IPC-2581 file which imports with warnings, or does not appear visibly appear correct - please send it to us. We will immediately take a look and determine a solution. To submit your file, please fill out the a support ticket and attach your file. https://support.numericalinnovations.com/support/tickets/new
Quick Fix for contours: During IPC-2581 Import please go to the Options tab, and check option "Convert Contours to Polygons (with Cutlines):". Then proceed with the IPC-2581 import as normal.
Thanks again, and I look forward to hearing from you.