veenuisthebest,
The system maybe have found a corrupted template and pulled it again from the database to cache, which is part of the active sector of vB Optimise to ensure data is intact. Either that -or- your XCache has a low TTL (time to live) setting so cache is dropped every 5 minutes or so.
Glad you like the additions, I'll keep aiming to reduce the forum home queries as it's the biggest impact of performance being the most popular page visited on a forum, statistically speaking anyway