Someone has posted about your add-on else where. It is drawing some interest.
In addition, I would imagine anytime something around here gets deleted, people also take interest. As I deleted my old template modification and told people to check out yours as the official replacement...
Add these two together as factors and your view count is going to climb.
Can't say there's anything wrong with how XenForo counts thread views. A quick way to check the completeness and accuracy of the count is to audit your logs and see if your numbers match. If a log entry requests a certain thread/link 100 times and the counter shows 100 (or thereabouts depending update frequency) then I'd say it's working as intended.