I dont use google analytics its too complicated and sometimes not very accurate. Google analytics counts in crawlets, bots and other junk visitors sometimes.
Analytics specifically DOESN'T count any of those things you listed. Analytics is by far the most accurate traffic counter there is.
It's funny because i used to use it and it always showed 10x more traffic than it was there. I used to have 300 visitors on my blogger daily, a months ago, and it always showed 3000, which is strange. Thats why i switched to statcounter, although not perfect, it was offline alot lately, but so far it showed very nicely the humman visitors.
Are you sure you weren't looking at pageviews or visits? Analytics is 100% accurate and is the most accurate platform there is. But you have to understand what the various things mean:
Unique visitors: if someone visits today, and again in a week, and again in 2 weeks, that's 1 unique visitor
Visits: if someone visits now, looks at 10 pages, closes their browser, comes back to the site and views 10 pages, that's 2 visits (1+1)
Pageviews: if someone comes and views 20 pages, that's 20 pageviews
There are other stats to consider as well, but I'm guessing those are the ones you're confused by.
If i get analytics now does it show the info backwards or it only counts from now? I might rethink and get it back.