I will add my experience and advice.
Its human nature to worry about something which has a direct correlation on your wellbeing.
In lieu of that, the only part of the process the veteran can control is medical information they submit.
Yes, sometimes information is overlooked with no plausible explanation. However unfortunately its out of the veterans control.
I tell vets, focus on the medical information.
Medical information is undeniable.
Stick to the CALUZA triangle and get your physician to be exact and thorough.
Your claims process might be extended by an extra step or two, but eventually the medical evidence will prevail.
Stay battle ready, get your medical evidence, be organized, and NEVER GIVE UP.