It would depend on the numbering. Is each team numbered 1 thru 18? I'd say if each team is numbered 1-18, then they were intended as separate team sets. Otherwise, we'd have a checklist numbered 1 thru 18 with each having 7 variations. If they are NNO, then it could be listed as one set.
I couldn't find a single image of the backs of any of these cards. Only one seller on ebay apparently has every set. I'm going to ask them if they can provide a scan of the backs of the cards.
Someday my cards may double in value and then be worth half of what I paid for them.