American Civil Liberties Union interview questions

Called by the hiring manager for the position for an initial screening, Then was scheduled for an interview within 2 weeks later. I was then called in a 2nd time to meet with the Head of the Department. The verbal offer came 1 1/2 weeks later. The delay came with my offer letter from Human Resources. The information sent was wrong (salary) and when I tried to contact HR, no one returned my calls and emails. I had to contact the hiring manager so he could reach out to HR. The new offer letter had the wrong start date. When I contacted HR, I was told that the person I was talking to was busy and that it would be fixed when I started. I never received a updated offer letter. On my first day, the HR person crossed out the incorrect information and had me sign the incorrect copy. When I asked for a copy, she seemed annoyed.