Um, ok. It also says something about wrong information?. I was pretty sure to check that info.
Could be he made some mistake while making your exam. If that so, contact him/her so he can amend it.
I have a CDL license, which was issued before 1999. It is ok to keep it? Because i'm not part of any federal operation, by the way.
There's no problem with that. you can keep it alright. In fact,you are elegible for Excepted Intrastate. For that, you must check you license has the required restrictions.