Upgraded PRO 6 to 6.5.1, had fan problems, went back to 6.5.0 and all is well again

I am in need of some help with my Pro 6.  I've upgraded from 4.2.28 to 6.5.1 without any issues other than my CPU fan reporting as 0rpm as I have moved the fan to the additional system fan header.  I've managed to find some topics on how to fix it, however if I then label the 'System' fan as 'CPU' my fan will run at it's max speed no matter what setting I have it on.  Whereas my system fan barely raises it's speed no matter the setting or how hot the sensor is reading.  

Am I better off just leaving them both labled as system fans or will this cause other issues with them not spinning at the correct RPMs???

I've also just rolled back to version 6.5.0 and I'm still seeing the same issue.

below is a copy of my /etc/sensors.d/system.conf

chip "coretemp-isa-0000"
        label temp2 "CPU"
        ignore temp3
        ignore fan2

chip "w83627dhg-isa-*"
        label in1 "DDB18"
        set in1_min 1.62
        set in1_max 1.98
        label in2 "AVCC"
        set in2_min 3.3 * 0.90
        set in2_max 3.3 * 1.10
        label in3 VCC3
        set in3_min 3.3 * 0.90
        set in3_max 3.3 * 1.10
        label in4 VCC1_25
        set in4_min 1.17
        set in4_max 1.32
        label in5 "VCC1_5"
        set in5_min 1.41
        set in5_max 1.58
        label in6 "VCC1_05"
        set in6_min 0.98
        set in6_max 1.10
        set in7_min 3.3 * 0.90
        set in7_max 3.3 * 1.10
        set in8_min 3.0 * 0.90
        set in8_max 3.3 * 1.10
        label fan1 "System"
        set fan1_min 600
        label fan2 "System"
        set fan2_min 600
        label fan3 "CPU"
        set fan3_min 150
        ignore fan4
        ignore fan5
        label temp1 "System"
        set temp1_max 80
        ignore temp2
        ignore temp3
        ignore cpu0_vid
        ignore intrusion0
        ignore fan2