That's very good TBH. It might be that fixing these two gifs is the best possible solution rathen then trying to do tricks with with datatypes. I need to analyze this further.
Unraveled the mystery, basically the fake Animations, are nothing more than GIF images with a transparent background.
Basically if on a GIF Image (GIF 87a), you create the transparent border, it is automatically saved as GIF 89 (Acronym for GIF Animated), then as if it were an animation.
Conclusion, if I remove the transparencies to the images in AmiGG, there will be no more conflicts and the GIF datatypes of the Build and the GIFAnim of the Contrib can be used simultaneously, and my Descriptors will no longer be needed
EDIT:
Negative, with the Build/Contrib GIF and GIGAnim Descriptors, you cannot use AmiGG, even if you convert the fake Images
Basically the 2 Build/Contrib Descriptors, have identical file internals, only the designated datatypes change, hence the possible confusion in Image/Animation recognition.
for the time being on AROS One remain my descriptors which do not have these problems in recognizing files.