can't use Acrobat after installing Creative Cloud

We purchased "Acrobat Pro DC subscription (one-year)‎" in May 2015 (or thereabouts). This needs to be installed for user 1 on devices A and B. We just purchased Creative Cloud All Apps for user 2 on devices C and D. The problem is that Creative Cloud would not run until we disassociated devices And B with our Adobe account. Now, user 1 cannot use Acrobat.

Should we have purchased Creative Cloud with a different Adobe user ID?

How can user 1 use Acrobat on devices A and B, while user 2 uses Creative Cloud on devices C and D?

Thanks,

Steve