Depends on what you call a history. Bids 08-03, 09-01 and 09-04 were all canceled.

Bids 08-01 and 08-02 had vacancies and excesses in them at the same time.

So do you believe that the programming logic is unable to manage both vacancies and an excess in a single bid?

Why not just tell us why they won't do them both together?