After taking a better look at your images it is clear to see you do NOT have your panohead set up correctly.
See this image showing the same area from image 3 and image 4.
The venetian blinds shows more in image 4 than image 3 and they should be the same. Granted the hanging clothes "could" have been swinging and this would account for it. Though I think this highly unlikely!
It is imperative that your panohead is set up correctly. You must be rotating the "Entrance Pupil" (EP) of the lens around the No Parallax Position (NPP) so the stitching software can align the images correctly.
Please see my tuition thread on setting up the NPP.