As Pam is entering the farmhouse, Dwight explains that this wing of the house was used for a tuberculosis ward up until 2009. Pam and Jim, however, visited Dwight's farmhouse as part of his Beet Farm B&B back in 2007, and there was obviously no medical ward assembled.
When Oscar sends an order to shipping before payment was received, the warning on the "Doomsday Device" wrongfully categorizes the error as late shipping.
When we see the final error made, the "Accountability Booster" screen is briefly shown. The last error listed is "Incorrect Order." This would be something like sending paper instead of a printer. It should be something more like "Incorrect Billing" as it was a discount that was miscalculated.