Shoudlnt eBay rules exclude the option Not to Combine Postage when sellers send together anyway.

On several occassions now I have gone to pay for mulitple items I have purchesed, the recent 8 in total, only to find when you request a total it suggests the Seller Does Not Offer Combined Postage. If this was compulsory to be put clearly in the description it might save some frustration. With three of the sellers I have dealt with in the last few weeks, all refused, some did not even reply when contacted but worse, and to add insul to injury, they send them together anyway at less that have at what they have charged, fraud or what. Michael