I think the official explanation is that there are multiple designs on the hard drive. Which would explain why we see the wrong one in Rogue One, but certainly wouldn’t explain why the Rebels are looking at the wrong one while planning their attack. That just doesn’t make sense. This was one of the best fixes in the original ANHR, I don’t know why it should be reverted back.
Neither Rogue One or A New Hope mentioned anything about multiple designs being on the hard drive.
They also don’t mention how the designs they have are very obviously incorrect.