Here is one more example where this is an issue (this time on the exit and that can make all the difference in the world especially on high spread pairs and during rollover).
I don´t think it´s a misunderstanding. To keep symmetry (if that is checked), all orders / entry / exits should be placed correctly on either bid or ask, depending on their direction (as explained above). This matters A LOT on high spread pairs and during rollover where spreads are generally high for a few minutes.