Actually yes the problem was tracking the transactions. There were literally competing spreadsheets that teams of lawyers had to argue about and reconcile by looking at emails between traders and comparing row by row. Have you ever tried to compare two spreadsheets? Lawyers know how to blackline two word docs. They don’t know how to compare two datasets programmatically. It’s part of the reason I started coding. I felt after charging $850hr to manually compare row level data across spreadsheets.

In fact counts eventually started getting harder on banks, rejecting the argument that tracking transactions was impractical and ruling in favor of homeowners and making the banks eat the loss for their own shoddy paperwork. But for many it was too late.