My settings do not require immediate payment, but for some time now I have encountered this issue of some buyers being forced straight to payment, instead of to the commit to buy page. This makes it impossible for me to send a combined invoice with postage discount for multiple items. After much frustrating research I have worked out that this ONLY happens with my items that are on markdown. I have randomly checked other stores and found the same thing.. regular priced listings generate the commit to buy page, markdown listings go straight to payment page. 

I have contacted customer service more that seven times about this issue, and continue to get misleading or incorrect responses such as-

it is a problem with the buyers account like unpaid items or restrictions... NOT TRUE

It is a glitch that will be fixed within 24-48 hours... NOT TRUE

Anyone got any workarounds/solutions?