This was fixed in the 12/4/15 patch.
If you turn on auto counters it'll add the corner innter cabinet without a problem. I was having the exact problem.
@Screech666 wrote:It is impossible to place any Inner Corner Cabinet in a left corner of any room. It works normally on a right corner of a room but never works on the left corner of a room. Seems like the inner corner cabinet doesn't automatically rotate like it should and it's impossible to rotate it to fit. There's an invisible collision in the corner that prevent it to connect.
Here's a screenshot of the problem.
This was fixed in the 12/4/15 patch.
