What goes wrong
Write vinyl, not strong tape, so the pick is the vinyl list.
Packaging Wholesale lists Vinyl tape for this line. Vinyl and PVC tapes are their own list, not a colour of the buff tape.
The check before you reorder
Choose vinyl for the cartons that failed with buff, not for the whole range.
Keep vinyl in a marked place. Mixed with buff, it gets used first because it feels stronger.
Dispatch on that order
On Packaging Wholesale, put Vinyl tape on the order with the lines it belongs to, so you are not paying a second delivery for the piece you forgot. Free UK delivery starts over £50 ex VAT.