Salaah

Waiting for one's companions to perform Salaah in jamaat when travelling

Q: I would like to know the usool/adaab when travelling in a group and stop for salaah at a musjid where the salaah is almost finished. All the brothers in the group have wudhu but one brother doesn't have wudhu. Should all the brothers with wudhu join the jamaat leaving the one brother to miss salaah with jamaat, or should all wait for the brother making wudhu and perform another jamaat, or should most join the main jamaat and a few wait for the brother making wudhu and make another jamaat?

Imaam breaking his wudhu in Salaah

Q: While leading the salaah, my wudhu broke. I was taught that it is best to break the salaah in this instance, due to the possibility of creating confusion. I therefore made one salaam and announced that my wudhu had broken while moving away. No one in the congregation stopped their salaah and the person behind me stepped forward to continue the salaah from the point that I stopped.

1. Was it correct for them to continue the salaah, as I had made one salaam (After my wudhu broke)?

2. Does the salaah have to be repeated? 

3. Can you explain any other  rulings that may help in such a  situation (does the Imam have to appoint someone, or does simply moving away suffice,
etc)