Images displaying third-party ownership or branding not deleted - The Virginian

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 to delete several photos of The Virginian, such as this one: https://www.imdb.com/title/tt0055710/mediaviewer/rm3357625600/, 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: #250817-165527-803902 #250817-165536-146502 #250817-165547-561202 #250817-165601-029602 #250817-165611-209202 #250817-165634-445502 #250817-165644-065302 #250817-165652-399002 #250817-165702-167302 #250817-165713-755902 #250817-165832-229602 #250817-165842-454502 #250817-165851-923702 #250817-165900-240302 *all pictures had a watermark from tv channel Starz, which started in 1994, while The Virginian is a 1960's series, a fact I pointed out in all contributions.