I found a bug in the way the cursor focusing isn't handled right.
Steps to reproduce the bug:
1. Open ST2 and switch to a view with 2 or more divisions (p.e.: Shift + Alt + 8)
2. Select a word from the division A by double clicking on it.
3. Click somewhere on the division B and write something.
4. Double click again on the selected word from A and try to right something. [BUG] -> you're still writing in B.