After viewing your documents, I can't understand your requirements. If your design Approx 26pages, but in your document not enough. If you have any page format, you should clear it. Otherwise design may not prepare perfectly.
After reviewing your Word doc attachments, your brief and your expectations do not seem to match. Is this contest for a Cover and example layout spread for articles or for the complete booklet?
In your documentation you indicate the booklet layout already being done by another designer. Did they remove them selves from this project or are you now looking for a different creative service?
Please clarify the number of pages which need to be prepared. Your support material indicates a much larger project than covered by the brief [and prize amount]. the spec indicates up to 14 articles for this booklet which would make it at least a 16 page booklet.