Ah welcome to AMAWED, @jaynene! Glad to see you here again today. Hahahaa...thank you for bringing popcorn and coke. Lol!
From my experience in steemit, when you vote and unvote, for any reason including the one you just gave, voting strength will not return instantly to what it was before you cast that vote. This is the reason why I would advise that you do not vote on any content until after some time, ideally after 30 minutes the content was posted. I hope this answers the question.