Most likely you did not deposit litecoin testnet coins via a user deposit address but via some other address. Hot wallet balance is not the same as user balances. If you like, you can check the Glossary section of the documentation where these terms are explained. Basically if you deposit litecoin testnet via a user deposit address, then these coins will belong to that user. You can use a litecoin testnet faucet such as https://kuttler.eu/en/bitcoin/ltc/faucet/ to test your deposits.