Why don't you capitalise the first word of your page titles?
When the original team of authors wrote the initial pages that became GPnotebook, they chose to use lower case in the titles of pages because the entries were intended to mimic a series of "notes to self". So, no, this is not a mistake or something we have overlooked... love it or hate it, after more than 30,000 pages, lower case has become the site's "house style" for the titles of content pages.