Glad you figured it out! Sorry it's a little tricky. When you work in world or parent axes, rotations are converted to local. It doesn't make sense to convert rotations < 0 or > 360 from world to local (world rotation is 0-360 corresponding to the world direction that the bone is pointing), so you need to choose local axes for values outside that range.

Thanks. For some reason your GPU is using the "generic GDI" driver, not the Nvidia driver. The generic driver is what Windows uses when it doesn't have anything better. I'm not sure why that would be. You can check in Device Manager which driver the GPU is set to use. You might try uninstalling the Nvidia driver's completely, then reinstalling them.