Don't get too excited over these incidents that are now called "gaffes". I am not a fan of Romney but let's be frank: the only thing that matters on election day is the economy and as long as the polls indicate that a very substantial number of voters (if not the majority!) think Romney is better than Obama when it comes to handling the economy, Romney is in a really good position.
Careful not to fall in to that trap; when it come to the economy voters tend to vote for who can assist
them economically, not the wider economy itself. The two are often not linked and can often be opposed.