This is weird - I'm shooting at f1.8, 1/250, ISO 200 in manual exposure mode. The exposure setting in normal view (through the viewfinder) stays exactly the same when I switch to live view as I would expect. However when I change to aperture mode (exposure setting is still f1.8, 1/250, ISO 200) and switch from normal view to live view, the shutter speed changes to 1/60. In other words, in aperture mode the shot is overexposed in live view vs. normal view even though f-stop and ISO are the same. I would expect the setting to remain the same just as they did when shooting in manual mode.
Any ideas on why this is happening? Why is the exposure changing in live view while in aperture mode when everything else (subject, f-stop, ISO, lighting, etc.) is the same?