That lvl has a flooring load and to partial roof loads. That's not a good sign.
Yes, their is just one 2x4 under the beam which is nailed to another 2x4 that goes up to the roof. I have some other pics that I was able to look at. Their are still braces everywhere so maybe they aren't finished yet? Not my house so I wont question it but will keep an eye on that when they go to framing mine. Wish I knew more about this type of stuff so I could keep a better eye on things.