Hi,

what fill height is proper for this washer? Above
the top row of holes?

Yup.

any idea why the tub on this washer has always
canted to the left?

Left is a bit odd...right is more common...

http://www.applianceaid.com/directspring.html

Maybe the suspension pads are worn...
http://www.applianceaid.com/suspention.html

Maybe the side springs are loose, or the screw for one of them is
loose.

jeff.
Appliance Repair Aid
http://www.applianceaid.com/