Why is 'Inset Faces' insetting faces individually? I'm following tutorial on Youtube. Why can't I inset selected faces like this guy does?



Instead it insets faces individually:



I did exactly what the tutorial said, I also use the same user preference settings but still this problem arises.

I tried to use Remove doubles in a round torso but the result is different: 



I don't use Individually Inset Faces and this isn't the first time, I had the same problem while making the shoulder but managed to fix it somehow.

He uses Extrude first then Scale in the process while somehow I can't use that way and end up using Inset Faces instead.
The faces are being inset into two regions because Inset isn't taking into account the Mirror modifier.

Make sure you don't have any more doubles, and immediately after pressing I to start insetting, press B to enable the "boundary" option.