I uploaded a batch of 10,000+ Accounts. Out of the Load file, let's say I have a record by the name Acme. Acme has apparently been successfully uploaded according to the Success Log (which also has Acme's new SF ID). I then extract all Accounts, and Acme is no longer there. Additionally, when I go to the web interface, a search for Acme returns 0 results.
The cherry on top is that the number of records present in the database is equal to the number of records present in my Load file, i.e, all my records were indeed uploaded.
The funnier thing is that if I look at the Success log and pick out a random SF ID, and do a search for it in the Extracted Accounts, it shows a completely different name for that SF ID. I first thought this was because I was opening it in Excel and since the CSV format might find commas elsewhere and mess up the order, but after having opened it in Notepad, the problem persists.
I'm about to restart the entire migration process but before I do, I wanted to know if anyone's encountered this before and if they have any tips on how I should handle this.