It looks like the small amount of alignment can be taken up with the rubber bushing. If not, the added sideways stress might be hard on the seals where the shaft goes into the shock body, but at least that is an easily replaceable part if/when needed. If the shock leaks or dies prematurely, that might be the reason.
If it was mine, I would probably move one washer to the other side, not fret over it; as long as you can get the mounting bolt torqued properly and can keep an eye on any possible movement there.
Rod J
Issaquah, WA