(1.) Orbital acceleration of the earth is causes dilation, so yes, it makes a difference.chinglu said:The rotational acceleration makes no difference
(2.) Dilation due to SR accretes continuously throughout the earth's orbit.because it only applies when the frames are again at the same place.
(3.) It's just the right size to account for dilation.It's too small to explain anything.
(4.) No, they would not agree, by a small dilation, on where the wavefront is.So, we have a y direction location light sphere location which is exactly the same for both frames
(5.) Yes, a small difference.and a different clocks measurement.
(6.) No, that's wrong, probably due to your error in (4).Therefore, we do not have a constant speed of light
(7.) You mean if spacetime is correct.if you are correct.