Acrobat Standard gets installed when trying to install Acrobat PRO
When installing Acrobat PRO, Acrobat Standard gets installed or vice versa.
The installer for Acrobat PRO and STD is same. It is licensed to PRO or STD once you enter the corresponding serial number or Sign in using the Adobe ID with the corresponding subscriptions.
1) Serial number based licensing:
The serial number for Acrobat STD & PRO are different. Check if the correct serial number was used when installing and activating Acrobat.
2) Named User licensing:
Use the Adobe ID which is associated with the subscription to Acrobat.
Note: If you purchased an Acrobat subscription or Named User License, you need to download and install a separate Acrobat installer.