What would cause this weird bearing wear?

Lube the bearings with motor oil... Set the crank in.. Tighten the caps to spec and see if the crank is tight to turn... If it's smooth. That parts should be good... Pull it back apart and see if the bearing are scuffed... If not Clean the bearings and pt it back together with Luberiplate...
http://www.lubriplate.com/Products/.../Lubriplate-No-105-Motor-Assembly-Grease.aspx
If it's tight, you need to fin the problems as discussed above... :)