My friend alerted me last night to the fact her daughter searched for Zog, and in the list of videos there was a porn title (Stormy Daniels Bad Girls).
Amazon customer service have so far been dreadful. She reported it last night. It's still there. I've reported it again this lunch time.
Although the child can not access the title without the pin, it shouldn't be showing up when all the devices searched on are set with parental controls. Mine is set to U and PG only. Hers is a kids kindle fire with parental settings. I've uploaded a screen shot showing how it shows up.
Just a warning from a very disgruntled parent. I do not expect to find 18 titles when my child searches on a device set up to prevent that!