Part 1: The Setup
It takes both a Place Bet and a Come Bet in order to Come Down w/Odds. If you're playing both Come bets and Place bets then you should expect to be Coming Down w/Odds and you should be thinking about how many Odds you’ll be coming down with.
Part 2: Come Bet Moves and Place Bet Paid
If a Point rolls that doesn’t have a Place bet on it then nothing matters. The process starts when the Point that the Place bet is on rolls. The Come bet moves behind the Place bet then the dealer pays the Place bet.
Part 3: Odds Are Added to the Come Bet and the Rest Is Handed Off
The dealer keeps as much money as they need for Odds and hands off the remainder. Tell the dealer how many Odds you would like. If you don’t tell the dealer anything they might give you a Come bet with no Odds and leave your Place bet where it is when you should of taken you're Place bet down and added Odds because they have no house advantage.