I went into VS2013 and created a new project and just tried making a really simple switch
but it formatted correctly for me, even with the curly braces. Are you able to post that set of code?
The only other thing I can think of is maybe a setting on how braces are set up, but I don't know why that would affect it. (Nor do I think there is really even a setting for that for C++...) Other than that though you could try just not using the braces at all since you are inside a case
statement, you don't technically need them.
Other than that something may have happened during installation. So re-installing is an option too.
EDIT:
Also, could just go with it and finish the code and then when finished just highlight the rows and un-indent ([SHIFT]+[TAB]) them back to their correct spot.