I am also having this problem... this is the error i am getting.. I am not evey using a magicbox.. I am using the merchant outbox. and firestorm viewer.. i have done as you have, switched from unlimited to limited and set an amount.. still no luck.. i dont know what to do
1 error prohibited this product from being saved
There were problems with the following fields:
Magic Box items which are not limited quantity can not be listed.HELP PLEASE