30 of flap 14 to 1600 rpm and trying to fly level
Which of the several approved pitches for the propeller would this be? Or, to say otherwise, I suggest less attention to RPM as a number to be an indication of power, as it can vary plane to plane. Instead, be aware of what the plane is doing relative to what you would like it to do, and adjust power as needed.
If a strut braced Cessna is dropping a wing, or otherwise not stalling wings level, it's worth reporting this to the maintainer. It is likely that the wing cams are not properly set. In addition to adjusting the angle of incidence of each wing, the adjustment of the cams also has a slight, though perceptible effect to sweep a wing forward or aft. It could be the case that one wing is swept slightly forward, and the other aft, which will affect handling at low speed.