Shop has been seeing shipping manifests created that show '0' in the Label Count column when there are actually packages attached to those manifests. There will be other manifests that show the full amount of packages, but when you print the manifest, it just shows a fraction of the actual package amount since the rest are accounted for in the ones marked '0'. The shop has been moving on by marking the '0' label count ones as printed, but are concerned that the extra time it takes for them to be scanned again in USPS may put them over their fulfillment time limit with TT in some cases.