Why doesn't the center of the integration box fall on top of the center of the predictions (yellow, cyan circles)? I found them to be offset towards the upper and lower edges of the Zoom box, but more or less centered in the middle.

Boxes are centered on pixel boundaries, circles are centered on precise values.


The integration circle/ellipse and background "square" are in white; if one clicks the left (I think) mouse button. a second time, one gets red circles/ellipses. Are these red circle/ellipses the integration box or the background box?

Both of them.