Veterans Affairs and NLN

I recently obtained my liscense as a LPN in the state of Ohio. I served in the USN for four years enlisted and used my GI Bill to get through school. I'd really like to gain employment at the VA so that I can continue to help those who have served. Whenever I look at job openings within the VA it states that I must have graduated from a school which is NLN accredited, I did not. It seems odd that the VA was willing to pay for my education and then turn around and say the very education they funded doesn't meet their requirements for employment. Does anyone have information regarding this ? Is this a preference or requirement ? Any information or prior experience with this situation would be appreciated.