List Import shows other lists Pending Import import even though you are only importing one list.
The List Import function can be accessed via API as well as through the Marketo user interface. By default, the list import function can process two list imports at a time and can queue up to ten more. If the API has a large number of list imports queued up, this may interfere with your ability to import lists in your Marketo instance. If this occurs regularly, you may want to work with your IT department to schedule the API calls to run outside of business hours.