Are there any strategies one must bear in mind when preparing proposals to decrease the chance of it being misunderstood?
In my organization, we address this challenge with two rounds of internal review before a proposal is submitted:


Pink Team: reviews the ideas and storyline of the proposal, typically as a fleshed-out outline but before significant effort has been invested in writing.  This is intended to identify major gaps and allow course corrections to be made before major effort is invested in writing.
Red Team: reviews a near-final draft document, reading in detail and checking for compliance with proposal requirements.


We'll typically use 2-4 people for these teams, of which one should have expertise in the material and one should not be an expert, in order to provide an outside perspective.  Often we'll use the same people for both teams.

Doing this makes proposals much stronger, but generally requires that you start them earlier, in order to be able to have time to really incorporate feedback.