Images displaying third-party ownership or branding not deleted - Fantastic Four (cartoon)

According to the image guide (https://help.imdb.com/article/contribution/images-videos/image-guidelines/G27LPBQZA7EAZGJW?ref_=helpms_helpart_inline#) "Images displaying third-party ownership or branding, such as watermarks." are not allowed.* For that reason, I tried on two occasions to delete pictures from Fantastic Four, such as this one: https://www.imdb.com/title/tt0061250/mediaviewer/rm2780452864/ but my contributions were declined. Was this in error or does IMDb have a different idea of third-party ownership and/or branding than I do? These are the submission numbers: #250731-200153-341502 #250731-200207-874102 #250731-200225-924302 #250731-200234-090902 #250731-200249-891002 #250807-190454-870502 #250807-190512-026702 #250807-190525-966902 #250807-190535-201402 #250807-190549-534802 *all pictures had a watermark from Cartoon Network, a network that started in 1992 while Fantastic Four is a 1960's cartoon, a fact I pointed out in each and every contribution.