I've just submitted v4.3.0 of Edit Orders to the Zen Cart plugins for review. That release contains changes associated with the following GitHub issues:

#50: Correct product.products_ordered calculation (thanks @siliconforks!).
#52: Correct PHP warning when an order-total doesn't include a "TAX_CLASS" setting.
#53: Additional notifiers for address-field insertions.
#54: Invalid value used in "Mock Cart" processing.
#55: Correct PHP "notify" issues.
#56: Correct order-total calculations when order-totals re-compute tax (e.g. group pricing), as reported by @swguy here.
#57: Properly report missing notifiers

I'll post back here once the download is available.