HT201272 Why does my download disappear after paying? No way to download now.

Question

How the **** do you get a download that iTunes screwed up?  ITunes thinks I downloaded it, but it is nowhere to be found.  This is b.s.  I hate apple.

Answer 1

Should I have set both networks with the same name, which I guess would alllow the various clients to default to whatever is the fastest?
Is that how it works?
Not the fastest, the best quality connection, which is a combination of signal strength, speed, low noise and who knows what else the Apple engineers have come up with for the formula.
The default setting for the Extreme is dual band, using the same wireless network name for both bands. This is the setting that most users should use because their device(s) will automatically connect to the best signal available depending on their capability and location.
You can "force" a connection to 5 GHz by assigning a different name to that band, but this does not assure you that you are making a better connection. It might well be worse.
Why? The upside is that 5 Ghz is capable of faster speeds. The downside is that you always must give up something to gain something else. In the case of 5 GHz, the signals are not nearly as strong as 2.4 GHz signals, so the 5 Ghz signals are going to be absorbed much more quickly by any walls, ceilings, or other obstructions.
To really get good perfomance on 5 GHz, you almost have to have a line-of-sight relationship between the router and the computer. So, 5 Ghz works well if you are relatively close to the router and you have a clear shot at the Extreme. Move your laptop down the hall and around the corner and chances are, the 2.4 GHz signal is stronger (and possibly faster) at that location.