Writing a proposal can be stressful. We’re often working late at night, on tight deadlines, under lots of pressure.
In that environment, the typos can get truly terrible.
Here are some of the worst culprits -- problems I see again and again, in proposal after proposal.
Multiple personality disorder. Are you Team Smith, the Smith Team, or the Smith team? Pick one and stick with it. Otherwise, your customer may think you and your twin are bidding on the proposal.