Makkot 5 - 1st Day of Pesach - April 13, 15 Nisan

When the conspiring witnesses pay/get lashes do they split the amount or do they each have to pay the full amount or get the full amount of lashes?  The Mishna discusses the definition of conspiring witnesses. What is the difference between conspiring witnesses and contradictory testimony? What happens in a case where every group that comes to testify is turned into conspiring witnesses by the same group of witnesses - do we assume the group saying "you were with us" to every group of witnesses is lying? Would it be the same if someone keeps bringing false witnesses to testify on their behalf and then brings witnesses who are not proven to be false? Do we suspect they are lying just because they were brought by someone already known to bring false witnesses? There is a basic argument between the Perushim and Tzedukim - do the conspiring witnesses get killed only if they succeeded in convicting the person but didn't succeed in getting them killed (Perushim) or only if they actually succeeded in getting him killed (Tzedukim)? The verse in Devarim 17:6 says that one gets killed based on the testimony of 2-3 witnesses. There are several drashot brought in the Mishna explaining what can be derived from the unnecessary mention of "three witnesses" in the verse.