According to the state of Ohio, I don't exist

So today, my grandfather was helping me with my taxes and every time we tried entering my social security number it said that the SSN didn't belong to a real citizen. We were entering it correctly in the format they were requesting. Yet, I don't exist. The funny part is when I was filing for the Federal tax return it worked. I have lived in Ohio my entire life. I was born and raised here. We eventually had to prove my identity by faxing information and stuff, but I found this quite amusing.
Has this kind of thing happened to anyone else?
Has this kind of thing happened to anyone else?