If you have, for example, 30,000 records in your Query/Export in the Raiser's Edge and you process them through Chimpegration Classic using the Export tool, you will see that Export broken into three separate control reports. This is due to a process that creates batches of records going into Mailchimp.
Records are processed in batches of up to 10,000, so that there will be three (3) control reports for 30,000 in the reports section once they have finished in Chimpegration Classic.
For example :
By clicking on each row and Save button will yield a separate control report for up to 10,000 records at a time.
Mailchimp deletes this data after 7 days, so you will want to download them and save them if you need to refer to them in the future.