In the mosque where I pray, the Imam stands at an angle of 5 degrees if compared to the people behind him and keeps rotating more at angle of 5 degrees while reciting the Quran. He is in proper alignment with people during the rukhu and sajda. The same continues in the next salah where he is at an angle of 5 degrees and then keeps rotating. But when he reads his sunnah he reads normal i.e he stands straight and does not rotate. Also he keeps touching the mimbar which is close to him as it is a small mosque while going into rukhu and sajda and while getting up from Rukhu and Sajda. Me and my friends had asked the reason to many elderly who come in the same mosque who said that the concentration level of his is very high so he does not notice that he is rotating and touches the mimbar for support (he does not require support while reading sunnah as he prays any where behind). No one wants to tell this to the Imam as he short tempered. So will our salah be complete/fulfilled or should I opt to pray at home as there is no other mosque nearby?