QBMS module has been updated to 1.9 and just going through double checking and final testing with the gracious help from Mydanilo.

This update resolves a legacy issue which could allow two distinct transactions submitted very close together to be erroneously considered a duplicate at merchant service - and therefore the second charge not recorded. This has been resolved such that if the SAME customer submits an order for the SAME amount within 5 min - then QBMS will consider it duplicate and not process the second charge. Any other orders, so long as they are differing amounts, or different customers, will process successfully as they should. Zen will show these "real" duplicate transactions as identical orders with identical transaction and auth ID's so please be aware of that. I may work on creating a check against prior transaction ID's for that customer and generating an immediate error on checkout - but for users with very large order databases, this could be "heavy" - so thinking about whether that is worth undertaking. In any event, the new 1.9 will be posted shortly, and is probably a good upgrade to use.