Nest box location

[abw67]

I just read that you shouldn't put the nest box on the floor so I'm wondering if I will have any trouble. We built our coop about 2 feet off the ground but the next boxes are sitting on the floor of the coop. Did we screw up or is this okay? Here are some pics if anyone could give me some feedback I'd be greatful.

 

[scratch'n'peck]

I don't think it is a really big deal. some people don't like them at floor level because they can scratch their coop bedding into the nest box. But that 2 x 4 that you put in between will block much of it from getting in.