How is all-in ev calculated?

[Disintegrate]

Hi,

I noticed one thing today after playing the most biggest losing session ever and running really unlucky. My all-in ev graph shows +26k, but when I counted all the sections in $EV diff paragraph together I realized I have been running -18.1k under ev. How is this possible?
What's the idea of all-in EV, how it is actually calculated and what does it really indicate? Im really confused..

[Patvs]

EV FAQ (http://www.holdemmanager.net/faq/afmviewfaq.aspx?faqid=68)


If you also play lots of SNG/MTT check out this thread (http://forums.holdemmanager.com/showthread.php?t=17437)

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The EV in the graph should match the total of all the different $EV sections in the SESSIONS tab.
For example take a look at TODAY (or yesterday's) data. Go to CASHGAMES-->SESSIONS---> (group by session)----> now the overall list with TOTAL NUMBER of (minutes played) / hands / $ EV should match the graph if you click GRAPHS (do the number of hands played in your graph / Sessions tab match?)