Let’s address each one.
I can see how you have come to this conclusion. There should really be a special note in the manual about this configuration but there is no mention. Here’s how it works. The CDI shows the needle deviation for NAV2 but does not control the OBS input for NAV 2. The OBS Knob only rotates the physical CDI compass rose but does not have an electrical OBS connection to the NAV 2 radio. Setting the compass rose here then is just a reference. To confirm that you’ll notice that if you turn the CDI knob so the compass rose rotates through a full 360 the needle deviation will not move at all. When in fact there are 2 VOR radials that should centre the needle. To set the actual NAV 2 OBS ( I.e the electrical interface) use the HSI control panel CRS knob while the HSI is selected to show NAV 2. The 1_2 button toggles between Nav1 and Nav2 when the NAV source is set to a VOR or LOC.
I have no issue following a NAV source with the autopilot so perhaps something was not set correctly. If it does it again some screenshots specific to that might help someone spot what’s wrong.
I can only assume you don’t have the latest version of the aircraft. The skidding thing was fixed in a very recent update.
Hope that helps.