The Quick answer is re-install manually, Six-Updater "tricked" you into thinking you were on 1.7.2.5, but if you check on the main menu you will see that you are still on 1.7.2.4 :D Hope this helped xD
Yes, but the M4A1 CCO SD is (in my opinion) the better choice as it's sights are accurate to the dotThe Holo (again, in my opinion) seems to have the recoil of a high-powered sniper rifle. ^There's a reason nobody likes that gun...