Is it possible it’s just a odd box of nails. I know with my regular paslode two strips of regular and gal is the sameDid run into a problem with the gun today while framing... I think it was the paslode galvanized nails... the strips are 3 nails longer than the non galvanized... so when your gun locks to reload... the next strip won't fit an lock in. So I guess your options are to either play tidly winks and cut 3 nails off every strip or get hosed into buying the ext magazine.
It's kind of a stupid design on their stock mag since like 90% of jobsites anywhere... have paslode nails 🤷♂️🤦♂️