_template pages included in search results

When I do a search on my site microchip.wikidot.com, _template pages show up in the search results even when I'm not logged in.

For example, search for "I2C" (a chip-to-chip communication protocol used in the semiconductor industry), and the page "i2c:_template" is at the top of the search results. I don't remember seeing this happen before and it is causing confusion among my site visitors who think it's a broken page.

It happens for all my categories, but "i2c" is the worst offender since it returns the template as the first search result.