New Plywood is Delaminating
It sounds like the mill’s blow detector was not functioning. Or a bad batch of glue, , plugged nozzle several possibilities,
take it all back. I used to work in a plywood mill and with 2 sheets bad that unit probably will all have the same issue. I would take the cut sheets back. The mill randomly pulls sheets and chizzles chunks and those chunks only a couple inches square have to stick together. 
So take it back and get some from a different unit.