An Imaam of a Musjid after performing Jumuah Salaat, goes to another Musjid and leads the congregation in Jumuah Salaat, and also recites the Khutbah.

Answer

It is not permissible for the same Imaam to conduct a second Jumuah Salaat whether in the same Musjid or in another Musjid. The Salaat of the second group performing behind this Imaam will not be valid. If this had really taken place, then they should make qadha of Zuhr Salaat.