BTLP swallowing listings?
Make sure to create an in-game ticket and write down the ticket number. This issue is easier for the in-game devs to solve than the forum ones. The forums ones are going to ask you for your ticket number so having one handy will make things go faster and smoother.
As for loosing things in the BLTP, it has happened before to other players but the devs are great about helping, as long as you ask the right ones