You obviously didn't read, or you didn't comprehend what I was saying.
I tried with for 4 skymin, then 1 skymin, then 4 land shaymin, then 1 land shaymin.
It's not the size, I've done 6 pokemon fully EV'd and IVs natures all data input correctly and nothing like this has happened. I highly doubt my AR will go from being able to perform 6 pokes at a time, to 1 at a time.