Some years ago I bought 100 TV aerial chimney brackets. They were all malformed and if the side of the chimney was vertical the mast came out on a slight tilt. I took them back and the man said I was 'a bleeding perfectionist'. He changed them though.
Likewise my son-in-law had a house in which the downstairs lavatory pedestal was faulty in that the base was rotated somewhat relative to the top part. It looked odd. The seat was correct but the base (which was eight-sided; well rectangular with bevelled corners) was at an angle.
Not the same thing at all, and I don't know why it comes to mind, but in the 1970s my uncle had a flat roofed kitchen extension built. The brickwork joined the existing building at each side. Somehow it rose one course on its way round. The whole structure was skew-whiff. The back window was on a distinct slope but the ceiling (I don't know how or why) was perfectly level, so the bit of wall above the window was visibly trapezoid.
Bill