al 456

We back up copper and inventoria first thing in the morning. I think it kind of 'unpacks' the software and gets it ready for use. It certainly fixed the first transaction problem. When you have many thousands of products and variations, the faster the computer, the better.

Is one computer running copper as a client? If so I think this will be normal operation. The second computer will be working as a kind of slave to the first.

Did you back up the data first using Tools > Back up data ?

If you mean the quantity of coupons redeemed in a specified date range....Reports > Payment Methods