For one thing, I would recommend a different gain strategy.
You do not want to have higher gain in the 2nd stage than the first. The higher gain number should always be in the first amplifier. All amplifiers have inherent noise, you are amplifying the noise of the first amp stage by 32.
I would at least reverse the order to 32x2, 16x4 might be a better starting point.
Please post a screen capture of your noise floor on the Signals tab of the controller GUI, in addition to your station number.
Greg H.