On TireRack's website it shows for the lm60 that a 235/35 can be mounted on a 8-9.5" wide rim and the 255/35 on a 8.5-10" wide rim. I'm surprised a 255 looks that stretched on a 10" wide rim. It almost looks like the 235 was installed on the 10" rim? I agree it doesn't look right and I would not drive my own car with tires mounted that way.
Why don't you send a PM to ben@tirerack with the pictures included and see what he has to say about the fitment/install, considering their website says both tires should fit on your rims.