Bug report: When barcode scanner always pointed to the wrong data, no way to correct the problem.

It seems there is a bug with the barcode scanner.  There is no way to train your barcode scanner to avoid the wrong data. Even if I already deleted the wrong item, your database still retain the wrong item as the default for the scanner.

For example, if I scan a barcode and it said food not found, then I click "add food" ,enter nutrition facts and check the "publish to database".  Two days later, I found some error in the data and delete this food, rebuild another corrected one. When it's time to scan the barcode for log, the scan result always bring up the deleted wrong one.