Issue with mutiple listing on ebay with openstock

Hi,
I am using opencart Version 2.0.3.1 with openbay pro and openstock. The main reason for the upgrade was for responsive site and to use new version of openstock.
I have no problems with my new products with varients when they are linked to amazon but ebay links don't seem to work, tried to relist and change defaults but nothing. All the stock levels change on amazon and website if something sells but not on ebay! the strange thing is if I go into a product with wrong stock levels i.e edit-save it then feeds the correct quantity
through to ebay!!
All single listings work fine on all platforms and if a multiple item sells on ebay all stock levels change too.
Has anyone else had this problem? Is there a solution?