On a monthly average prior to 6 months ago, Google used to only miss indexing about 2 or 3 of my webpages before I began using a XML sitemap. Since then, they've been missing about 15-20 and several of these have gone un-indexed for months. While that's not a lot considering I have 270 webpages, still, an XML sitemap was supposed to help Google index better... not worse.

These aren't webpages that simply fail to make Google's search results either (I have a few of those). Those cases are when Google can produce your webpage by searching for the exact title (including author, etc) but not otherwise produced for a particular keyword. If Google cannot produce your webpage by searching for the exact title, then the chances are high it wasn't indexed. Further proof is when they would list a referring page but not the page itself.

Instead of looking for perfection I should have gone by the old adage "if it ain't broke, don't fix it".

P.S. I've been using an on-line sitemap generator to produce it which Google accepted as being 'okay'

Any similar experiences out there?