Okay, I'm not sure if this is the right place for this, so if not, lead me in the right direction Alright I have one long shelf mounted to a wall in my bedroom in 5 points. The shelf is on brackets like this: https://www.homedepot.com/p/Everbil...te-Magnum-Shelf-Bracket-EB-0099-8WT/204657448 but a longer length, and with 5 brackets. I installed them about a year ago. The two on the ends and the one in the middle were mounted to studs, using stud mounts, and the other two I used drywall mounts to mount them to the wall. For the last year I have had no issues with them, I put a bunch of books on them, enjoyed them, until quite randomly, this afternoon, the three in the middle partially removed themselves from the wall, causing many of my books to plummet to the floor. However, the weird part is, the shelf refuses to return to its original, level position. I would have to force it in order for it to be level again, or remove all the brackets and start over. It's not like there was too much weight, and that pulled it out of the wall, it's more as if this is its neutral position, and some other force besides gravity might be the culprit. I don't have time to take down the whole shelf today, so I was wondering if anyone had any thoughts, or ideas as to what might have caused this, also any tips when putting the shelf back up.