tracking of planned order from a Preq number

Hi Experts,

From Preq table EBAN I have got many NB Preqs with creation Indicator as U (i.e. Converted from a planned order) and

now I would like to track down those planned orders from which these Preqs got created. Please let me know if there is any report or table or any way we can get planned orders using Preq number.

Secondly is it possible that a Preq is created from a planned order on 01-Sep-2009 but the Preq date in EBAN is coming as past date say 20-Aug-2009?

Thanks