NEC3 ECS: Damages to be levied

The Contract is NEC3 ECS where X7 applies.
The Contract Data stipulates damages at a weekly rate.
No daily rate is clarified/referenced.
The Secondary clause states that the damages are to be levied using the rate stated in the Subcontract Data for each day the Subcontractor is late.

Can the Contractor levy the full weekly rate per day?

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.