3 questions 1 answer Parshas Bo

PARSHAS HASHAVUA בא 3 Questions: 1) Why don't the מדקדקים place two Mezuzos on each door post one vertical and one horizontal to be יוצא ידי שניהם? 2) Why don't we place the Parshiyos in the Tefillin at an angle to be יוצא ידי שניהם? 3) Why when placing the Mezuzah at an angle don't we say that you are not יוצא  according to both Rashi & R.Tam, since it is not vertical and not horisontal?   1 answer: The Gemoro (Menochos 33a) says  עשאה כמין נגר פסולה if you placed the Mezuzah like a bolt/peg it is פסול. The Machlokes between Rashi & R.Tam is what type of  a bolt the Gemoro is referring to. (vertical or horizontal) The Machlokes is not which position one should place the Mezuzah but which position not to place the  Mezuzah so that it is not כמין נגר. All agree as long it is not positioned like a peg it is כשר. Positioning the Mezuza at an angle is not a compromise (doing it halfway like both) but is the proper לכתחילא   way to place it, (according to both) being a peg is never placed at an angle. Therefore when placed at an angle there is no need to place two Mezuzos. It is positioned according to both Rashi & R.Tam in the proper position.You are יוצא ידי שניהם  by placing it at an angle This solution won't work by Tefillin.  Placing the Parshiyos in the Tefillin the Halacha dictates how to place the Parshiyos and not how not to place it. Therefore by placing it at an angle both Rashi & R. Tam will agree that it is Pasul. אמבצי The Gaon who holds to place the Mezuzah vertically  (not angle) also holds it's not necessary to put on R.Tam's Teffilin. In both cases since the Halacha is like Rashi there is no need to be יוצא ידי שניהם