I will be travelling to Bangkok in September via Singapore. I arrive at 9.20pm and leave for Bangkok at 7.15am next morning. I was planning on staying in the transit hotel in Terminal 1, however I have been told that I need to pick up my luggage in Singapore as Jetstar do not onforward. It appears that I need to go through immigration to collect my luggage. Can someone enlighten me on what happens, as at present I am a bit fuddled.