puzzling problem

One of the benefits of buying the CNC-cut kit is that all the planking comes with puzzle joints in order to produce long planks without scarfing. These joints lock in place, with epoxy, and then can be glassed or butt-blocked on the inside face for added strength. I'm not sure if this will be required given that there is a lot of surface area for the epoxy to create a strong bond.
Just this weekend, I attempted to dry fit the puzzle joints of the sole of the boat and was shocked to discover that they simply would not fit!

I expected this to slot in with a light tap!

The width of a finger is clearly too big for the "hole"

by approximately half a millimetre

In a panic, I checked all the other planks and the same was true for all. The fingers were 0.4 to 0.8mm too wide for the "holes". Vivier advised that this should not be the case and that the joints should be the exact size. Possibly there was an error at the cutter (somewhere in Queensland). I may have to sand or rasp the fingers to get them to fit! I certainly wasn't looking forward to that.
I wondered if the ply may have expanded due to humidity from the air here in our Tasmanian winter. Wood certainly expands with humidity and hoop pine can expand and contract by 2-3%.
So, I brought the sole pieces inside our warm house. Each day I have been checking them to see if they will fit. No luck yet but the fingers seem to be shrinking.
I hope that after a few more days i will be able to report back that they fit without any (or at least minimal) sanding.