What would cause this weird bearing wear?

Yeah that was probably my mistake. I didn't do that this time round taking them apart, it happened last year (well 2013) when it was first built, so the motor was actually already ran with those marks, and the rod bearings all looked pretty good (was just the main bearings really that were the problem). This time I got them apart without any prying, I just hit them with a soft hammer and they popped off.

It's only like that on a few of them, there isn't really anything I can catch my finger on, but I will inspect every rod for raised marks. Pretty annoyed at myself for not being smarter when I did this.