Images displaying third-party ownership or branding not deleted - Wagon Train #2

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 Wagon Train, such as this one: https://www.imdb.com/title/tt0050073/mediaviewer/rm1756636416/, 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: #250807-194705-104902 #250807-194714-988102 #250807-194722-454002 #250807-194731-115102 #250807-194739-905402 #250807-194748-730202 #250807-194757-777602 #250807-194805-758902 #250807-194819-622202 #250807-194830-794102 #250807-195007-302102 #250807-195018-469702 #250807-195028-203202 #250807-195046-800002 #250807-195137-438902 #250807-195508-275902 #250807-195517-257602 #250807-195526-471202 #250807-195535-862602 #250807-195544-132402 *all pictures had a watermark from tv channel Starz, which started in 1994, while Wagon Train is a 1950's-1960's series, a fact I pointed out in all contributions.