Hi guys, I'm new to Spine. I have tried to import and animate small, high quality figures created on illustrator. Everything works and the result of the animation is not bad. Graphically in Spine everything is perfect, the problem arises when the animation is exported. Using Game Maker Studio 2 to create a game, I need to export the animation as .JSON. The problem is that once the animation is exported, in the folder created with the PNG images, the .json file, and the .atlas file, the png images are bordered with a dark, fairly pixelized border. In addition, the animation seems to be "slow" compared to that seen in the editor. I will blow you two photos, the first is the image as it is seen in working in Spines and the other when exported.
After:
Before: 
Thank you guys!
EDIT: Okay guys, it seems I fixed it. I set in the export-atlas settings, the "Bleed" option on, this seems to have fixed the black border around my pictures. Unfortunately, however, the problem of animation "slow / in slow motion" continues to persist. Look forward to your advice, thank you!