SUS password change NOT reflected in EBP

This is a SUS user management issue, in regards to the EBP-SUS scenario.

1. When an admin user in SUS creates a bidder user, he supplies a password for this bidder. This bidder is replicated to EBP successfully with this "initial" password.

2. When the bidder logs onto SUS, he's forced to change his "initial" password given by the admin to a new password.

Problem: The bidder's new password is NOT changed in EBP. So now, the bidder has a new password in SUS, and the "initial" password in EBP.

This should not be the case. What are we missing?