You're right. I thought it was an Infopath issue, but it's a SharePoint setting. I'll talk to my Systems department. Thanks for pointing me in the right direction!
"Database Connector has throttled the response. The response from database contains more than '2000' rows. The maximum number of rows that can be read through Database Connector is '2000'. The limit can be changed via the 'Set-SPBusinessDataCatalogThrottleConfig' cmdlet."