I can try answering the first one, it's because you have installed the 32bit and 64bit versions of the same software, which by default will install in Program Files (X86) and Program Files respectively - that's an MS doing. But maybe Adobe installs both just because...
There are times when having the ability to have both is quite handy - e.g. to install an earlier version of the 32 bit edition when you think something has gone adrift in the latest version of the 64 bit edition.
I have the luxury of being able to avoid Adobe software - on the rare occasion I do need something from them I install it in a VM, use it, and uninstall it. For me, the history of AcrowBat-from-hell and Flash-back crashes left an indelible blot on their copybook.
BR
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