No, it has nothing to do with the construction method. The Japanese maker responsible for the Calypso builds excellent knives most of which use that same method, or a similar one. If you got a lemon, you got a lemon, it cam happen with any construction method or maker.
As for what Spyderco can do about it. Assuming it is defective, rather than just the slight vertical blade movement common on midlocks, Spyderco does not normally repair defective knives. They replace them, if they have the same model or a newer version of it in stock, or issue a store credit for MSRP at their online store if they do not. The Calypso was a Sprint Run from several years ago, so it's unlikely that Spyderco still has one laying around to replace it. I have no way of knowing for sure but, if I had to guess, I'd say a credit at SFO is the most likely outcome if they consider it defective.