SCCM is a great Discovery tool, i.e., it inventories and captures everything. However, it's not great at Normalizing data and really takes some effort if you want to use it as an Asset Management tool. You see those additional versions of Adobe for a couple reasons.
1. Adobe leaves remnants of versions every time it installs a new version. So, it actually could appear that you have multiple versions of Adobe on a single PC. Adobe is not the only vendor that does, but definitely one of the worst.
2. The data has not been Normalized and SCCM cannot accurately tell you which is the most current version on a PC, or which one is actually being used.
To Normalize the data and have SCCM automatically report accurate data you need a 3rd party app. Check out Normalize for CM from BDNA, when you get a chance. It does all the work for and actually turns SCCM into a real Asset Intelligence platform.
BDNA has a 60-day trial: sccm.bdna.com