Edit: the explation I gave here turned out to not be fully correct. However, I've decided to keep the original post and just highlight this with this note, so anyone following this thread in the future can go through all the discussion and know I'll correct this info in a later reply! =]
Hello!
From your links, I think I understand what's happening.
The thing is, regardless of whether you are using the default 3 frame or a higher frame count, the plugin expects the spritesheets to be compliant to the spritesheet sizes commonly supported by the engine. That is, a spritesheet with 8 characters sheets, or a file with a single character (with the filename starting with $).
From the second image you linked I can see it may have 4 sheets with 8 directions and 8 frames each, one for walking, one for running, and two blank sheets. Because the engine expects the file to have 4 more sheets below, it will mess the calculations used to isolate each frame and behave erratically.
You need to either isolate each character sheet into a single file (with its name starting with $), or expand the image file adding 4 more blank character sheets below the ones you already have.
I'm not sure if my explanation is helping or making it hard to understand, so here's an example using your file. I've edited it to highlight each character sheet, making it more visual, and also bluring the images to prevent it being copied without permission:
