Although the thread is old, this is a relevant concern for me today.

I think with over 6000 feedback and over 15000 transactions, I know about quoting postage and how that is affected. I am not saying ebay is changing the postage, the customer is. It is saying

'buyer edited total' WTF?

This has just happened in the last week customers have been editing their own totals. This is a brand new concern. I'll contact my top account specialist and see if he has any solutions and post what ebay have to say.