I am not sure what you mean by pop out? Do you have an example or a screenshot?
As for blurring, that could be caused by post flair. I have seen some communities in the past create a post flair called NSFW that applies blurring in addition to the actual NSFW flag that can be set. The post flair causing blurs is an option that community mods can set when they create/edit the post flair. The intention behind that was for stuff like spoiler blurring, but there isn't anything stopping them from applying it to whatever they want.