When you check the Scheduled/Manual under Updates, the program queries the Active Update Servers for the latest available patterns. Thus, higher patterns sometimes show in the Available Version column.
For example, if your scheduled update is running daily at 1AM and there are new patterns uploaded to the Active Update servers at 9AM, you will see the new patterns on the Available Version column of the Update page. These new components in the Available Version column are not downloaded until the Scheduled or Manual Update runs and loads them to the program.
This issue happens in the Anti-Spam pattern which is frequently updated.
To minimize these occurrences, change the interval of scheduled update to hourly.