Went for an interview and they asked for my SIN

Went for an interview for a live in Superintendent position for two people. Don’t know what to make of it all

1) they gave us forms to complete even though they had our resumes

2) starting pay was advertised $2,000 with a free two bedroom unit but their form they gave us at the table was for 1,800.00 plus opportunity to earn more with incentives. Like $20.00 per rental you sell, 50.00 mth for fully rented building, etc.

3) they said they were going to do a credit check to make sure we pay our bills. I have never heard of this, is this normal practice?

Author: CompetitiveDay6490