Various masaail of Jamaat Salaah and Imaamat

When should the muqtadi commence his Salaam?

Q: In a Shafie masjid, when the imam makes salams at the end of the prayer, the congregation waits until he has completed both salams, then they make their own salams. Sometimes the salams of the imam are lengthy, making the congregation wait for a long period (longer than 3 subhanallahs). If a Hanafi follower also delays his salam in this manner (waiting for the imam to complete), will his salat become invalid due to delaying a wajib (i.e. intentionally delaying the first salam)?

Imaam breaking his wudhu

Q: If the Imaam breaks his wudhu during leading prayer, I know he can appoint another to be imaam, but is it also aloud that the jamaat does continue each individually their salaah ? Also, if the imaam is just leading 1 person, what is the situation then?