Well, how would you like to be treated? Try looking at it with the shoe on the other foot... now what makes sense?Also, what are your goals for communication? Decide how to handle these matters such that those goals are furthered.
Of course personal messages can help alleviate confusion....
Maybe the time to clear up a misconception is when you see that it is actually in the way. A good friend of mine did that. He saw that something that had been left vague at a certain point in time had become something that might inhibit trust, if disclosed without care... so he chose to say he was uncomfortable about that and just gave the correct info, and listened to me about whether I felt odd about it. It worked fine-- closer than ever.
Last... if you become aware that your communication style often leads to incorrect assumptions, try asking someone you trust why that is. You can always adjust....
And other than these considerations-- you can't actually be responsible for people's perceptions. It is an option to simply leave people to their own conclusions.
~S~