1) Why are there 3 bars displayed but only 2 on the lower screen?
2) Why is the name Sabbah changed to Sabbah 2 on lower screen?

I just bought a 200$ router that can't even give me a proper and fast connection to my damn basement!
Any ideas on how to fix this shit?

1) One of the windows has not updated yet. Not a big deal.
2) Your computer had an issue connecting to the original network and reconnected. Then named it "2". I have had this happen on mine before. It will not effect your connection at all.

Even though you have a good router the wifi card on your comp may be less than desired.

Is the router upstairs? A lot dome transmit and the bottom signal is the worst, flip that bitch over and try. Or if your house is newer it won't get it through all that shit in the walls / floor.