In some rare occasions, when you insert a block you can find your Insert rotation angle is 90° instead of 0° in your insert dialogue box .
In order to avoid this common mistake make ensure that DIRECTION CONTROL is set to EAST 0.00
Keyboard : UNITS
Pull down menu : Format > Units
Change Base Angle to East 0.00
Then SNAPANG value set to “0”
Now you will get rotation angle at 0° in your Insert dialogue box.