'We' for 'I' in writing

[RonButters at AOL.COM]

If we have discussed this before, I apologize. What I want to know is how one 
might communicate to the folks who created MicrosoftWord's grammar checker 
that some of their advice is totally crazy. For example, in a legal document I 
wrote:

"During the academic year 2005–6 I will chair both the Linguistics Program 
and the Department of English at Duke. ..."

Word insists that this should be changed to read, "During the academic year 
2005–6 we will chair both the Linguistics Program and the Department of English 
at Duke. ..."

I have gained a little weight since January, but not enough to qualify me as 
plural. Nor am I the queen of England (who is reported to have once said, "We 
and our husband are glad"). Nor am I a nurse--who apparently can get away with 
saying things like "It is time for our enema" (oh, but that is a different 
'we'--here it means 'you'). Could this be some kind of Yankee reflex of the 
mysterious, ghostly, singular Y'ALL? 

Does ANYBODY teach students to write papers in which they refer to themselves 
as crowds of people or stuffy old queens? That is soooo 1930s, it seems to me 
(us?)