What do you make of this?

It seems to only happen on my last board of each leg, and when I have the glued-up board on the bottom of the stack (with gravity and the other 7 boards helping my clamps out).

On a related note, I have also seen glue squeeze out from the middle of the edge of a board above the glued-up board. Not in a glue line. From the middle of the board. Maybe all this is normal and I’m just a newbie to gluing. A gluebie.