Bug in DSO2000 software and lack measurement of math results

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Hello. I found a bug in DSO2D15 with software 230831.
Incorrect signal positioning after changing the vertical or horizontal scale when the signal is inverted and the vertical offset is not 0. If the signal is inverted and the vertical offset is 0, everything works correctly. If the wrong signal position is displayed, to return the correct signal, you must turn invert off and on again, or return the vertical offset to the center by pressing or rotaiting the vertical offset knob.  After that can change the vertical offset again (until you change the vertical or horizontal scale again).
I'm also very frustrated by the lack of measurement of math results.