Mostly the ASUS download section is sorted by the order in which things were released with the most recent at the top. With the "Download from" options under any given item they are all the same file, just some might be faster than others.
One thing to be careful of is to get the correct driver for your version of Windows. Sometimes there are 32 and 64 bit drivers. I've never tried it but it may be possible to install both at once and that would definitely cause two of everything to show up. If you think this is what has happened then I would uninstall all audio drivers and software and then just install one and only one driver package.
A bus station is where a bus stops. A train station is where a train stops. On my desk, I have a work station…