credit scores

Q. My daughter thinks she’s going to marry her boyfriend, who she lives with. He had a bankruptcy two years ago. Their apartment is in my daughter’s name. What does she need to think about before marrying this guy?

Q. I authorized my husband as a cardholder on my Amex card to help him re-establish his credit almost a year ago. I canceled the card a month ago because I felt it was the right time. My husband now tell me that his credit score went down 94 points because I canceled the card. I cannot buy into this theory. Is it true that I actually did hurt his credit score?

My FICO score is 812. It was 828 in 2013, but I think it dropped when I co-signed a SallieMae student loan for my grandson. Payments for this loan are being made on a timely basis, always before the due date, never missed and never late. I have several credit cards, all with zero balances. When I do use any of these credit cards, I pay the entire balance due each month. Some of these cards have very high credit lines. My question: if I contact the credit companies and ask to have the credit limit lowered, would my FICO score go back up?