Thats the point. If its a restriction (or 'mistake many buyers make' which you've 'had to explain many times') then the interface for doing this is .... deficient . The cart verification logic should disallow you from completing the entire transaction if shipping isnt filled correctly for each individual vendor ( which it does for purchase fm a single vendor ) - so thanks seems its a TM site bug/deficiency the rather than vendor config or other.... And its not 'obvious when you think about it' as a) the site allows it without restriction or comment and notifies that the multi vendor transac...
Wrt TM website:; Anyone else had problems with using the shopping cart for items fm multiple (domestic) vendors, paying shipping for most expensive and combined for all the rest ( all supported and fine for the TM website allowing continuation to completion), Complete the transaction with 'success' email - then one of the vendors comes back demanding addtl shipping $ as shipping iniitaliser cost was not combined with another of their items? The TM shopping cart allowed and flagged this as OK and the sale transaction was completed/successful and email notified as usual but the vendor balk...