You've got 18 frames for each set, so far so good, but the frame sizes are way off. The xml is expecting an image with frames that are 64x64 and yet your sets have frames of 135x135.
The placement of each frame in the image is irregular, sometimes they overlap, sometimes there is too much spacing and then none at all.
The image size doesn't make sense either, if you have 18x135px frames, the image size should be 2430px which isn't the case in your images.
In the image Air Photo Colombia (no number) the frames are way off (the blue lines I set every 135px) :
The image Air Photo Colombia3 is the closest one to working correctly, but even in this set the frames sometimes aren't placed correctly, have a look: