That has turned out quite well, though there are a few stitching errors visible if you look hard for them. The hotspot links to another pano (your second?) where things have gone horribly awry. I suspect that all that's wrong is that the equirectangular image has been cropped at the top and/or bottom, with the result that its pixel dimensions are not in the ratio 2:1 and the horizon no longer lies along the horizontal centre line. You can probably correct the image by increasing the vertical canvas size in Photoshop (placing the horizon in its expected position). Always ensure you output a full 360x180 image and you won't have any trouble. Otherwise you've done well.
Since you used Autopano, i think the explanation for your distortion is as I suggested. By default, Autopano outputs a cropped equirectangular image when there is a hole at the zenith and/or the nadir. Maybe in your panorama there was either no zenith image or Autopano was not able to include the zenith owing to the difficulty of assigning control points to the inky blackness of the sky. The cropping can be prevented by going to Edit->Settings->Panorama and specifying the Preferred Projection as Spherical, and the Preferred Extend as Maximum projection range. If that's not the explanation, then I can't think of any other just at the moment.