Yes, you are. Occasionally members do other things. We had a vote on the Trans-Pacific Partnership agreement last week in the House. The major opposition party is opposed to it. One of the members, a former trade minister who began the negotiations on it when in government, actually voted contrary to his party, with the understanding that he was going to do that. He voted with the government in that instance.
On May 17th, 2016. See this statement in context.