Astrid Import/Export

Prior to flashing my first custom ROM yesterday, I exported my Astrid tasks using its built in export function. After flashing and Astrid being reinstalled, I imported my tasks. The problem I'm having is that many tasks are missing, or changed to older versions of themselves. For instance, some monthly repeating tasks that were recently completed appear only as deleted, without the next iteration of the task being active, while others appear as deleted, but with a due-time-of-day that was changed months ago.

Did I do something wrong? Is there some problem with Astrids import/export feature?