Instruction: Answer the given question using the supporting document.

Input:
Question: why do drawers keep falling off track?
Document: The only real complaint is that the drawers keep falling out of the slotted tracks that are to hold them up.
I have purchased three of these, and I think they are wonderful.I saw them on a Quilting video, and I emailed the lady who did the video and she told me she got them at Lowes. Kewl, Huh? I keep all my sewing materials in them.I also put one in my pantry for bags of macaroni, noodles, beans etc.....The drawers slide easily, and the casters are heavy duty. You have to purchase them separately and also the lid.
I am in the process of ordering a replacement lid, but to let everyone know I have had my set of (2), since 1989. I do not like chest of drawers as they take up too much space in a room, so these have worked perfectly and fit even in my apartment closets. So definitely 5 stars.
This is the same product I bought 5 years ago...but now you are providing it without the drawer stops...so that the drawers slide all the way through. WTF? They are just cheap ass little plastic stops...but they are invaluable to the use of the product and I cant buy them anywhere. So now I am stuck with a product that still functions...but not well like it should/could. How cheap of you folks!
This product was just want I needed for my master bedroom walk-in closet. I had done a lot of research and this is the one I decided on and I'm glad I did. There are just some clothing items that need drawers yet they need to be kept in the closet rather than drawers in the bedroom. This product was easy to put together and sturdy. I like that you can see through the baskets and they are easy glide.
These basket style drawers are great, very practical for many different things! The stacking is great also. I LIKE the fact that the drawers pull all the way out. They can be removed and carried to where you need them,  I store bike supplies and parts in a drawer and can pull out the whole drawer when working on my bike. Lots of uses.BUT, the box these are shipped in is totally inadequate! I have ordered these shelves three different times from two different suppliers.
Two of my three separate orders arrived damaged. The box they are shipped in was designed for a retail store. It would be great to buy at the store and carry home. But give it to UPS and expect it to make it across the country? No way. I am returning a shipment today and keeping my fingers crossed that my fourth shipment arrives intact.
The container store sells them 4/$2.99 ;-) yes it's annoying that it doesn't come with them... But to be fair they usually sell each drawer separately and this is still a bargain! !
My wife uses these baskets to store her knitting yarn. We now have a total of ten of these and they are great because they are stack-able and with the optional plastic tops they make a nice wall unit with usable space on top for additional storage.
I just purchased this on Home Depot site for 53.00, much cheaper. Also IKEA has a similar system for less than HD however I cannot claim the stability of the product. I may purchase a second one. Much cheaper than buying a dresser and works well with the closet system I currently have.
Answer: I am not sure If I am explaining this right but you should have received several long wires that look like hooks that goes at the back or on top of the drawers it hooks on one side and then you push it down on the other side, this keeps the rack together if not the drawers go off the track because it expands.  I am not sure if this explanation is helpful but you should have received a couple with the drawer set, I have mine hooked on top and it stabilizes it.