Download Brokerage Data Problem

I have four accounts at Schwab. Downloaded three of them and the next day downloaded the fourth. However, downloading the fourth deleted the other three. I specifically check to download only the one fourth account. Is this a problem with TT? Do you have to download all accounts from a given brokerage firm at once.

This is a very frustrating problem with TT - either doubling up downloaded accounts or deleting ones that should not be deleted.

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