Maybe they will notice. But if you met the criteria of a witness who personally knows you and is a member of certain professions, the only question they might have is whether you actually signed the application in that person's presence. If so, they might contact your witness to confirm. Someone else on this forum mentioned that their witness had been contacted. But I don't know if they do that regularly.
From what others have posted here, I get the impression that they do accept that there may be minor inconsistencies in names and dates. Record keeping wasn't as precise in the past. In various official Irish records (birth, marriage, census), the first name of one of my great grandmothers appears as Lizzie, Eliza, and Bessie. I didn't use that ancestral line in my application for other reasons. But it shows that official records have a lot of varations, and DFAT would be aware of that.
I am sure we'd all love to be able to know the status of our applications as it moves through the approval process. Do they sit in a queue for a while, waiting for initial review, then wait in one or more additional queues where they will wait for final approval, document preparation, and mailing? I don't think anyone outside of DFAT knows what is involved in the process. Hopefully, if additional information is needed, that is identified early.