Jamaat Salaah and Imaamat

Imaam moving forward when a second person joins the jamaat

Q: I was leading salaah with one muqtadi, who was standing 1 foot behind me, when a second muqtadi joined the prayer. However, the muqtadis did not move back 1 saff, so I dragged my feet and moved 1 saff forward. However, I dragged my feet 4 times to reach my place.

1. Is the salaah valid?

2. Is it necessary for the imaam to move forward if the muqtadis don't move back?

3. Is it necessary for the muqtadis to move behind?

Qualities of an Imaam

Q:

1. I would like to know what are the attributes of a person being imam and leading salaah?

2. Can a haafidh who is known to exploit and be dishonest or is a substance abuser lead salaah; fardh or taraweeh salaah?