Yeaaaahhhh....ummmmm... This link that you provided, http://seticlassic.ssl.berkeley.edu/newsletters/newsletter10.html, is to a newsletter; it is not "the SETI website".

Nor does your provided link state or comment on any of the following "logical things" you state as true:

1) that all of the SETI program revolves around a single frequency scan of the sky and
2) that SETI is only surveying a 100 ly swath in the sky.

Want to take another stab at finding the "REAL" SETI website? It's not that hard I assure you?