baden
It could just be an error, these letters are often copy/pasted from others and it is not unusual to see irrelevant comments.
Unless there is an actual reason why an award would be prohibited from an earlier date, for example; you have not suffered from your current limitations for three months then I would just ignore it, ultimately, an award will only be made by you showing that you meet the Descriptors for one.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems