Are you sure that your pinion was allright before you put it on place?
The teeth seem deformed and are/seem too thick at the right side (don't fit the spur), hence the noise & wear at spur.
Well didnt notice anything wrong when it came out of the package, that one there is the 16t and I bought a 15t so when I took it out last night I looked it over and its fine, odd thing is its narrower then the 16t was but as you can hear its making the noise to.