multibit balances wrong, not correct for any individual address
due to this bug and other reported bugs seemingly related to improper accounting of change addresses escalating to LOST BITCOINS see someone else's post here: (http://www.reddit.com/r/Bitcoin/comments/22gt4r/major_mulitibit_bug_btc_gone_it_cost_me_all_of_my/) 

I've switched to electrum, fortunately at the time (tons of blockchain resets), multibit was reporting my entire balance and was able to move it all to my electrum addresses.