Ah that diagram about the bar shows uneven rail thickness. I notice on mine one side is considerably thicker than the other. I don't know what could have caused that but if it can cause the problems I'm seeing then maybe it is time for a new bar.
It appears that the bar I see in the background in one of your pictures has maybe been hot and shows burned blue metal blisters along the edge of the rail???
Look at the other side of the bar's groove and if it's even try flipper the bar over.
Kinda appears it's time for a new bar and get a new chain AND SPROCKET at the same time. Do not get a low kickback chain if you are serious about cutting wood.
Also make sure your oiler is working good or you will ruin a new bar.
If you see any wear grooves in your sprocket, replace it or it will ruin a new chain.
If the thickness is less on one side on your bar your chain is will lean when in the cut due to the bar groove being too wide. You can check the bar groove WIDTH inside along it's length with a feeler gauge and also check it's depth.
From what I see the bar looks very?????????????able.