I recently purchased Oneworld Explorer tickets (Business Class) during the Anniversary 10% discount period. Paid for and tickets issued.

Due to business commitments I was obliged to amend the dates of travel by 1 week - no change to routing, just dates! This was done shortly after the Anniversary 10% discount offer expired/

I was horrified when TA informed me that according to CX I would forfeit the 10% discount and therefore had to pay the difference before tickets would be reissued.

This appears to be completely contrary to the the Oneworld Technical Rule Sheet:

[i](a) Rebooking/Rerouting
(1) Prior to departure
(a) Origin TC1
(1) After ticket issuance - changes to the first international flight and preceding flights are not
permitted less than seven days prior to the date of the first ticketed flight. Date/time/oneworld
carrier/inventory changes to other flights permitted provided ticketed points remain the same.
(2) Changes other than to Date/time/oneworld carrier/inventory permitted at a charge of
USD125.00 per transaction.
(b) Origin TC2/3
(1) After ticket issuance - date/time/oneworld carrier/inventory changes are permitted provided
ticketed points remain the same.
(2) Changes other than to Date/time/oneworld carrier/inventory permitted at a charge of
USD125.00 per transaction./I]

Is this a CX scam or just ineptitude on the part of CX ticketing department ?