Neatline Time Item Query results not same as Item's Item Query results

[ostwaldj]

Omeka Classic w Neatline Time 2.1.2, hosted on ReclaimHosting.
I have 232 Items with collection assigned, Public set, dc:Date in ISO 8601, and ItemType = Event. Other items in collection have other ItemTypes.
When I do Search Items query in Browse Items view off of Collection and ItemType, I get all 232 items.
When I do exact same Item Query search in Neatline Time, I only get a handful. Nor can I see any additional items if I simply search by record numbers. Creating a new Timeline doesn't help.
Suggestions?