Relax. This is not a new problem. Normally only output (large) tubes are matched. If input (small) tubes are not marked "left" and "right" etc., it won't matter. The output tubes will be marked as pairs in some fashion. Before you rip the boxes open, look for rubber bands holding pairs (or quads) together. Alternatively, the boxes themselves will be marked. I store my tube boxes in the exact same order that the tubes are installed in my amps, so if I try another set ,the tubes always go back in the original boxes. Stay cool, and if when your amp arrives you are not certain, post again with specifics, and somebody will walk you through it.
Do make certain that you plug the small input tubes in the correct sockets, if you get them backwards (i.e. put the 12ax7 in the socket intended for the 12at7, the darn thing might not work. Read the instructions concerning output tube bias carefully before you proceed. Tubes are tough and will withstand abuse, but improper bias will kill them off in a hurry.
Finally, tubes have been around for almost a century. If they were difficult and delicate flowers, they would have been abandoned long ago.
Do make certain that you plug the small input tubes in the correct sockets, if you get them backwards (i.e. put the 12ax7 in the socket intended for the 12at7, the darn thing might not work. Read the instructions concerning output tube bias carefully before you proceed. Tubes are tough and will withstand abuse, but improper bias will kill them off in a hurry.
Finally, tubes have been around for almost a century. If they were difficult and delicate flowers, they would have been abandoned long ago.