Yep, increase the guide rate to 0.5x sidereal.
This should improve guiding. Then, lower aggressiveness until you get a flat-ish graph.
And, yep, anything lower than 45 degrees and you're trying to guide through turbulent crap. I have set CCD Commander to only start imaging once an object rises past 45 degrees and to cease imaging/move to next target once an object has set past 45 degrees.
Hope you get it sorted out!
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