Ah, yeah you did miss some spots but it was a quick fix- When you make adopt batches you should add your signature or a watermark or something to prevent character/art theft. And have a lower resolution version of the overall image used when you upload it publicly so if someone does steal it they won't get the "good" version. If someone buys a character, you can give them the full res, transparent version in private~
An easier way to have a transparent version is to save the art in individual layers. Like the coloring layer, the background layer, the lineart layer, etc. Save it as an mdp so all of the layers are saved with it, and then you can open it up whenever you want and exclude some layers to just leave a character with a transparent background. ^ ^