I think perhaps the scenario that savage describes would happen in a person who is alkalizing just enough to release acids but not enough to neutralize them. You're diet seems above and beyond alkaline which is probably why you dont get the chance to see you acids show up on the pH paper.
I personally have seen this in my own experiements and I take my pH every time I urininate. When I take in "just enough" alkaline my pH is acidic and I feel less than healthy than had I taken in "more than enough" alkaline to neutralize the acids.
Also avoiding acidic foods can have the same effect. Thoughts and emotions have a stronger effect than I ever imagined.