Google Adwords Help (traffic estimator error?)

Hi guys.

I'm using googles traffic estimator to estimate traffic. For some reason, at times, the MORE keywords I put in, the less estimated clicks per day it shows... this should be TOTAL clicks, and not an average, right?


Example, if I just put:

"Lose Weight" - It'll show an estimate of 18 clicks per day


Then, if I put the following..Basically, a long list of keywords, WITH lose weight included, it only estimates 13 clicks per day... And the more keywords I remove, the more clicks it estimates...

this shouldnt be an average, so whats up with that?

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