Amazfit Watch faces

Hi: Sorry for my English. My problem is with gifs. I try to remake one wacth (stich), but when I try in "RawImageMode" my new watch and gif, up the size from 290 to 950 kb and give me error in my band 4. I try with no modifications, but the same watch (Stich) go from 250 kb to 950 kb (the file bin ...