Single post in Image errors!

Kawotor, Lutriva, and Selutians minisprites seem to have spacing problems if placed in the following order! I've been trying to pinpoint the problem, and I can't seem to recreate the effect with any other minisprites except for these 3. Here is the sequence I discovered this problem in, which can be found in the 'Favorite Pokèmon ' tab in my about me.