Shift in issues with 74HC165

Other Hardware LEDs and Multiplexing
2 
any thoughts???

You may want to read the datasheet.

Some code for you to try:

unsigned char hc165_read(void) {
  unsigned char mask = 0x80;
  unsigned char tmp = 0;

  do {
    digitalWrite(SCK, 0); //clear sck
    if (digitalRead(SOUT)) tmp |= mask;
    tmp |= 0;
    digital Write(SCK, 1); //set sck
    mask = mask >> 1;
  } while (mask);
  return tmp;
}

And you should get the loading of the chip right as well.