The VA may not have a copy of your DD214 on file. Believe it or not, sometimes they don't if you've been going to the VA prior to everything being electronic. I recently moved and had to switch over all my records from DC to PA and the PA VA in Pittsburgh told me I did not have a DD214 on file. I thought when I originally applied at the VAMC in DC, I gave them my DD214. Along with my medical records, I guess it got lost too.
This may not be the case for you, but you might want to check with your local VAMC to ensure they have a copy of your DD214. I just recently downloaded those letters and had no problem with my information being on there. However, the local VA office had some errors in their files as I noticed on my benefits letter last year. I had to send them the corrected information. The local VA offices and the medical centers do not share the same information and are on different systems as I was told.