From the Sprite Something page:
Onion skin: press onion button once to set relative onion skin, twice for locked onion skin. Relative will maintain the frame difference between current frame and onion frame, Locked will stay on the same frame if you change current editing frame
Not sure that's the solution.
If not, export individual frames and animate in iaza.
Wow! Animation of right shoulder is a bit clumsy 
But all character is wonderful! I love it!
Yeah you got some onionskinning going on. Which program did you use to animate?
Preview is NPA (Not pixel art), which means it can't be accepted through to the gallery until it's fixed. Very good sprite though, has tons of charm!
The anim has a problem: the frames appear stacked up behind each other; the preview should not be resized; the text should be hand pixelled too. Looks good though, hope you can fix!
What anim software do you use?
He looks like he is sitting rather than standing.