In your environment you may be supporting multiple Microsoft Office Update channel versions. For example from Release notes for Microsoft Office security updates you will notice the following Semi-Channel Updates:
You will find version 2008, under the Semi-Channel Update, and you will find the 2002 version under the Deferred update. However, you do not see version 1908.
Patch Management Solution 8.x
Patch Management Solution only offers two versions. The two versions in this example would be the latest version 2008, and the preceding version, 2002.
This is currently working as designed. Patch Management Solution only offers two versions. The two versions in this example would be the latest version 2008, and the preceding version, 2002. If possible you can utilize Software Management Solution to distribute and install the older update.