QSqlTableModel and insertColumns() issue

If i insert extra column in any place in model, except end, I'm getting original columns that are after the column I've inserted shifted on two positions right. Last column in model disappears. The function i use to add column is insertColumn(). Data for this column is specially handled in reimplemented data() function in QSqlTableModel subclass.
Checked with QTreeView and SQLITE database.
tableTest.zip - small project to reproduce this bug
with.jpg - screenshot of the test program with insertColumn(2) function call
without.jpg - screenshot of the test program where insertColumn() function is commented out