There are transparent borders on the images, as I said. If you can post your png file or whatever here, we could see if that's the case there and try it with our Construct 2 programs if it does import correctly. So far the plausible explaination is that something went wrong when you created/saved the images with Photoshop.
Sorry to spam, I now see that when I save the project, the images are getting saved with an extra transparent pixel that is inexistant when I import the picture as a sprite in C2. So my guess is, I only need to understand what creates this transparent 1pixel border.
Doesn't happen with my C2.