I think it was about two years ago now I switched over to the Plano 3701's for my terminal tackle. I've got one for hooks and one for weights and etc. Since I switched to those I haven't had any issues with anything sliding over/under the dividers. If you are looking to use what you have though and modify it, you can super glue the dividers down. Otherwise, you can get yourself a roll of aquarium airline tubing, split one wall of it so it forms a "c" and slide pieces of it over all the dividers as it'll fill the gap between the top of the dividers and top of the containers. For something like split rings or swivels you can either keep them in small bags, or if you want something waterproof, you can pick up some contact cases. Put your stuff in there and label the lid.