help with speculars

I'm having such trouble with this piece of content. I can't get the shininess to disappear from the entire item. I've been creating custom content for a long time and I haven't had issues with speculars like this. I just want the shininess on the zipper in the back which was original to the corset in the first place so I didn't edit anything from the original and yet it keeps coming up. I thought I just added some shininess to the buttons on the skirt as well. and I've done it the same way I've always done it. I do it the great tone way and I just do maybe 10 or 20% grayscale in Photoshop and then I make the alpha to match the alpha of the item because that's how I thought you were supposed to do it. I'm posting pictures of content I've made successfully along with this item just to show that I'm not new to this but I can't figure this out for the life of me.  I used to be able to insert pictures from IMGUR but I can't get anything to show up now so this is the link to the photo and I'll provide the package also google drive pics . . package cc