I have been trying with much trial and error to rendezvous two spacecraft in orbit. My target vehicle is in a circular orbit of 1000 km by 999.9 km. What have seen is that apoapsis is listed as 1000 km but 1000.3 km is what is reported on the AGL. Apoapsis is not being reported as 1000.3 km just 1000 km. In a tutorial video I saw that animation speed could be reduced to 1/8 speed. I can only get it reduced to 1/4 speed. When I set the speed at 1/4 and then hit the backward arrow, the game pauses.
Go the slow mo thing, open your settings, the slider is at the bottom of the first page. It can go all the way down to 1/20 as well