If you attempt to modify an imported assessment question, when you are in edit mode, the correct answer is no longer there and needs to be re-entered
1) Import assessment
2) click on assessment name (note, answer displays on next screen)
3) click modify
You can view this in a test for megan 2 (7bca5537-6772-425d-00af-00c9d66e87c2) on stable/oracle rc2. Screenshots and import file will be attached.