Tabsequence not working in tableview

The tablesequence in not working in tableview.

I have 3 fields in a tableview; 2 of them are not in the tabsequence.
But when stepping throught the fields in tableview, the fields which are not in tabsequence still get the focus.

In my opinion that is not correct

Is that a bug or expected behavior?

That is default tableview behavior that walks of the cells. The field itself doesnt even get focus. Its how a table just works it selects the next cell.