CS6 Install Question Program Files (x86) 64 Bit

A bit confusing on Installation of CS6.

I have 8 ADOBE CS6 folders that installed into "PROGRAM FILES" and 8 installed into PROGRAM FILES (x86).

There are two versions of ILLUSTRATOR, PHOTOSHOP AND BRIDGE. One 64 Bit the other is 32 Bit.  Is that normal?

After downloading first time, I noticed on my desktop a folder -"ADOBE CS6 Production Premium"   Inside that folder was an Adobe Folder, inside that a SETUP.exe  file. So I double clicked on that...and more downloading started. (So I don't know if that was a second download, or a redundant download, normal or not?)

I don't know if ADOBE installed into the right locations?  Why into two different locations (plus a folder on my desktop?)   Is it all supposed to be in one place?

Everything WORKS. I had to create shortcuts for the programs onto my desktop. All of the software works fine.

I just don't know about the two versions of those three programs - 64 and 32 Bit versions?  Is that normal?

I also don't know why some software installed in the two different locations? Is that normal?

THANKS!