[ShrimpBurrito]

That looks bad. Absent any sort of "trauma" to the roof, such as a falling tree branch, I would say that the wood beams in the roof have rotted, or at best have somehow pulled apart. It appears structurally unsound, and to prevent further damage, I'm not sure I would use it until I got it fixed. If that is indeed the case, to properly repair it, you're going to need to replace those beams, either with new wood or with steel tubing -- that is a huge job, but some members here (like MariaG) have done it.

One easy way to tell if they might be rotted is to pull out a few screws attaching the trim around the end of the shell, like around where the seals are. After pulling them out, if they have brown/black rotted wood around them, then you have your answer. If there's what looks like wood you'd see at a lumber yard, then there's something else going on.

This is most definitely not typical.

Dave