I suspected that
From post #8
5 - 13
4 - 1
0
That completes the 14 pins at the one side
14,16
15
23 - 20
18 - 19
That makes 9 pins. The analog pins A0 .. A5 are 18 - 23.
I have 14, 15 and 16 as unknown pins; possibly the SPI. So yes, OP is out of pins 