Tacit, I'm taking notes, thanks!

Still curious on this issue, any ideas?

1)Is that weird that this wi fi extender is not doing any better than the base station?
2) Weird that speed test change wildly every 2 seconds, hence do they mean anything?
3)Odd And is it weird that on my worst website freezes and stalls the speed test will sometimes say things are going at a blazing fast speed of 19mbs?
4) Do channels matter? The D-link guy said setting it all with the best channels is a big deal.