No - you should not smell or hear propane escaping. Make sure the connections are tight. Also take soapy wanter and put on the connectors to look for bubbles. If there are bubbles it is leaking. If you don't find it turn the tanks off until you get someone to check it out. Propane can/does ignite (explode) so be careful.
Bob, Sandi & Marmaduke the Big Pug
SW OREGON 2004 Journey 39K, 330 Cat
If towing: a 2006 Mini Cooper or 1995 Wrangler