The title pretty much explains everything. All the tube connections are secure, the only possible way I believe they could've escaped was through the hole in their outworld, but I had a plug(that had a smaller hole in it though), so unless they all squeezed through that little hole I don't understand how. It's not like just a few escaped, I found a ton wandering around.
They congregated around a dish where I cut up a roach, with some in a random cup I used for catching them. Obviously I took them out before I took a picture.
If you can somehow spot a place where they're getting out, here are pictures of the setup.
If anyone has good ideas on how to make some kind of trap for wandering workers please tell me them, thanks.