It would appear that the Contractor has changed the standard entry in the Contract Data to say damages are charged at a weekly rate. All other things being equal, as the Contractor has created the ambiguity, it would be interpreted in the way least favourable to the Party who created it i.e. the Contractor.
Therefore, damages are charged at the weekly rate per week stated in the Contract Data.
Therefore, damages are charged at the weekly rate per week stated in the Contract Data.