I wonder if this is the case because those wall posts aren't specifically yours. You posted those onto another user's timeline, and thus it's probably not withi

I wonder if this is the case because those wall posts aren't specifically yours. You posted those onto another user's timeline, and thus it's probably not within your power to delete them. I'm not saying that this is the right thing to do, but it fits with the available data. If you removed all your photos and they're still gone, but wall posts are still there, it's an issue with how Facebook view data ownership. If you delete status updates or relationships, work etc, they stay gone too I imagine.