The zed is very fussy on the front wheel alignment, get it right and it feels like a different car, check the wear on the front tyres is even, stand in front of the car and visually check the camber of the wheels
it should self correct, it isnt normal but it could be a simple fix like 4 wheel laser alignment (approx £40), if in doubt ask him to get it done and take another test drive
the rays are a common and known issue - they bubble, most have been refurbed