I wonder if it's a glitch in the latest Words with Friends update.
I don't get the ads (I have the paid version) but I have noticed that since 12 July, when the update happened (the free one got updated 13 July), that my iPod and Video apps show up in my SBSettings as programs that have been used. They don't show up in the multitasking bar, nor can they be removed via RemoveBackground; they have to be manually deleted (stopped from running) from within the Processes section of SBSettings.
So, while you don't care about my issue
D), I'm thinking this might be a symptom of problem with the app. Do you see this problem with any other app than WWF?
I'm just finding it a weird coincidence...