Fun with credit reports

I just did my credit report for a potential new landlord. The credit score was good, but it noted the following dings against me:

> The amount owed on your revolving/charge accounts is too high

That's funny. I pay my balance off each month.

> You have too few/too many accounts being reported on your file

Which one is it? Too few or too many? They're keeping me guessing.

> There is a lack of recent (non-mortgage) installment loan information being reported on your credit file

As in, I'm not burdened by debt? Seems like that would be a good thing. Or maybe it means all my debt is with Mafia loan sharks.