The X62/61/60 have four PWM fan headers that connect to the pump, but only one of these fan headers has the fan tachometer cable(all 4 pins), but all are controlled via PWM based on the one fan's speed.
The reason Asetek did this is because if you threw 4 different fan speeds at the software it would cause problems with reporting.
If you have the two fans connected to two of the 3-pin slave PWM connectors, this could cause your issues. Check and move one of the PWM fans to the 4-pin PWM connector that has all 4 pins.
CAM is also only compatible with Windows desktop. When using a laptop or linux setup data may not show properly.