My numbers don't add up!and
I can't get it to ignore my visits to my blog!and
When I check my stats in the late afternoon, I show a number of page views for "today". If I check my stats in the evening (just a few minutes later, maybe), the stats for "today" show zero and the numbers, just seen for "today", now show for "yesterday".
There are multiple discussions in Blogger Help Forum: Something Is Broken, which open with one of the above topics, and which contain "answers" describing another of these concerns.
Some of these problems are caused by Blogger coding or design deficiencies, others by misconceptions of the blog owners, and still others are cause by security settings on the computers of the blog owners and blog viewers. Until we understand the etiological nature of these problems, they will never be solved.
My Numbers Don't Add Up!
Some bloggers are treating their Stats displays like a balance sheet. They look at numbers by browser, by country, and by post, total up the figures in each category, and observe that they get different totals for each. This they see as unexplained discrepancies.
Unfortunately, stats can't account for more than 10 countries or posts in any time period, for shifting trends over different time periods, or for the fact that there will be pageviews generated for archive retrievals, label searches, and main page activity, as well as individual posts.
The bottom line here is that you should not expect any totals to add up to any definitive figure, such that totals between each category would be expected to balance, like your checkbook.
The Option To "Ignore My Own Pageviews" Doesn't Work
The ability to have Stats ignore activity by the owner requires a cookie which carries this setting, from when you the blog owner select the option, to when you the blog owner surf the blog. The cookie is unique to one browser, on one computer - and in some cases, to different people on one computer. If you have more than one browser, more than one computer, or more than one person using a shared computer, you will need to consistently select "Don't track ..." for each browser, each computer, and each user.
The cookie must be accessible across domains, since it's created from "Blogger.com", and read from "BlogSpot.com" - or whatever domain your blog is published under. It must also be persistent across browser restarts. The cookie will also be a problem, if you have more than one Blogger / Google account.
When you, the blog owner, use a computer which blocks third party cookies, or which deletes cookies when the browser is restarted, the cookie won't be available to Stats. With Stats unable to access the cookie, your pageviews will be counted by Stats, when you surf your blog. If you login to a second Blogger account, your pageviews will be counted by Stats.
If you share a computer with someone else - either with shared login sessions, or unique system logins - make sure that you are in agreement with the other person, or that you consistently use your own login session. A shared computer, logged in under another person's login, will not have access to cookies that you create, under your login. And if the other person clears cookies, under a shared login, your cookies will be gone.
And note that most anti-virus and firewall suites - and some high end NAT routers - also contain cookie and script filters. Every one of these accessories, that you have on your computer or your network, should be carefully checked.
Block tracking cookiesis a setting that one blogger found enabled, when he examined his firewall suite.
Yesterday Starts During My Evening - Not At My Midnight
From observing the complaints about stats resetting its counters daily, it appears that it's setup to reset counts for all blogs, simultaneously, at midnight UTC (aka "GMT"). Some blog owners contend that it would be more useful to them if the counters for their blogs was to reset according to their local midnight.
Imagining this to be a separate option for each blog, requiring over 24 separate reset processes (a minimum of one schedule per major time zone, worldwide), it's impossible to imagine how pageview counts could be reset at midnight, for all Blogger blogs. I suspect that using the UTC clock, to schedule all blog resets, is the only real possibility here.
The bottom line here? Just as with some Blogger problems in general, some problems with Stats may start with our computers.