Wide Surface Clutter Band on Axiom 9

[jcarufo]

I have a new Axiom 9 that I recently upgraded to Software Version: v3.1.96. I'm running a 'y' cable with RV-100 Real 3D and P-66 transducers. Running in the mouth of the Columbia River in Oregon brackish to salt water up to approximately 100' depending on time of tide. In Automatic mode have noted intermittent broad 1" plus feathery surface clutter band at very top of screen with either 50khz or 200khz band of P-66 selected. Have tried to adjust surface clutter setting in manual mode without success. Without changing any settings there will be times that the 'surface clutter band' is in it's normal 1/4" (?) mode. Nothing is selected differently, the screen just appears differently. With 'wide surface clutter brush' showing, bottom contour 'might' appear more pixelated. Also noted occasional 'double bottom' of say 60' and 30' in 30' of water on same screen that only clears if unit is rebooted. All issues are with P-66 transducer AFTER the software upgrade. No issues prior.
I'm just learning the machine and have spent most time using the P-66. Love how fast everything is and target identification is stunning. I'm probably not adjusting correctly because of my unfamiliarity with the unit. Any assistance would be greatly appreciated.
Thank you. Have a Great Day!