(reply to my e mail per previous post)
We're the operator of Dalaman Airport Int'l Terminal. There are different responsibilities within the Airport, which are defined by international organisations. Those rules are same in whole World, Turkey, Russia, USA, England, Australia, etc.
The check-in procedure is under the responsibility of the Airline Company and operated by their licensed Ground Handler. The Ground Handling Companies follow the rules for baggage allowances which are defined by the Airline Companies.
So, the "problem" you mentioned is resulted from the defined rules of the Airline Company. If you are not satisfied about that rule, you normally send your complaints to the Airline Company.
I hope this information is satisfactory.
Please do not hesitate to contact me again, form any further question or clarification.
Kind Regards,
Yildirim Oren
Deputy General Manager