Images displaying third-party ownership or branding not deleted - Wagon Train #3

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/rm364127488/, 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: #250812-225625-647402 #250812-225634-566302 #250812-225644-438102 #250812-230104-554602 #250812-230114-777302 #250812-230122-524002 #250812-230132-445202 #250812-230141-643502 #250812-230151-818802 #250812-230200-548102 #250812-230209-418802 #250812-230218-230802 #250812-230228-221602 #250812-230237-748402 #250812-230247-796702 #250812-230258-367902 #250812-230307-333902 #250812-230316-803302 #250812-230327-985602 #250812-230336-483702 *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.