It's normal to see fluctuations in your view count because we want to make sure the numbers are 100% accurate, so we perform additional verification & spam reviews. Explained in detail here: https://goo.gl/fCxaJw . Hope this helps clarify.
You will be receiving an email with detailed info if you've received a strike. Also, you can find the info in your Creator studio by clicking here: https://goo.gl/516oPS . Hope this clarifies.