Unfortunately, most people worship their pirs and look unfavorably at criticism of him. They will often act like a gang, or even tag team, and attack others. This is very sad and very silly to see. It makes the Murids look childish and petulant. Guess what, your Sheikh can be wrong and he is a human being. All human beings can make mistakes and you as a murid should not argue about what you do not have any knowledge of. Imam Malik (may Allah show him mercy) said, "Everyone opinions can be accepted or rejected except the owner of this grave." This was in the field of knowledge and the owner of the grave is the blessed Prophet (may Allah bestow peace and blessings upon him). Yet, most Murids are doing this on a regular, and some, on a permanent basis.
Most Murids are the worst advert for the Sheikhs and that applies to every path that I have seen. You should love your sheikh but that should not make you insane by slandering and backbiting others.
One recent book on salawat states a hadith from a Jinn in which the action of salawat can save one from hell. This hadith contradicts other hadith in which the person cannot change their final destination, heaven or hell, its already written. Though, we do not know where we will go and this should not put one off from doing good actions. Nor, can we verify the contents of the hadith nor chain etc. So this hadith would be left matruk and shaad, because it opposes stronger hadith. Because people will read this hadith they will think its true. Hadith that cannot be verified are left and no ruling can be given to them. Imam Shafi does not accept hadith that are mursal - missing a companion (except by five conditions). This hadith is missing names for centuries!
You should respect and love your Sheikh, this is the main pillar of the path. But your love should make you hate, slander or attack others. If it does, then its not love at all.