Wimdu bookings are not downloaded to Myallocator and don't adjust availability - why?

Background:

Wimdu is limited in its capability, as it does not allow us to download bookings from them.  As such, any bookings made in Wimdu must be updated in our system by reducing the availability manually in Myallocator.

Additional Information:

This won't cause overbookings, as you must always confirm those Wimdu bookings with your customers.  So, if you check in our system and there is no availability, just cancel the Wimdu reservation.  Otherwise, decrease the availability in Myallocator to adjust for the booking in Wimdu.  

Again, that is a limitation in their system that they don't allow channel managers to download bookings from them.