Firefly is changing the images I'm using

We recently had older adults and kiddos that we serve create outfits for paper doll rabbits (i know it sounds a bit silly but it’s super fun).  With the first batch i was able to create videos of the rabbits walking the red carpet so people could vote for their favs.  

The first videos went well - some tiny outfit changes occured (we lost a couple of hats) but in general the bunnies were kept the same.  

Now that I’ve loaded in some more bunnies, Firefly keeps changing their appearance significantly.  This spoils the fun of the project.  It’s not allowing the original creations to be seen.  I’ve told it to not change the appearance of the rabbits, but it is completely ignoring me.  I’ve spent like 3000 credits and am running out.  Any ideas on how i can phrase/edit to make this to work?   The kiddos will be out of school soon, so the clock is ticking for me.