I am trying to create a filter for the action engine, that filters out cases, where CHANGED_FROM attribute of a change order quantity activity has specified value (<1).
Important is that this attribute CHANGED_FROM is maintained also for other activities, but these values are not relevant for me.
First I did just two separate filters:

1. Cases include change order quantity
2. CHANGED_FROM <1

But the second filter apparently looks also at other activities, so it took some of the not relevant activities, which gave me false positives.
How can I configure that filter that it really only looks on the value of CHANGED_FROM of activity change order quantity?
Thanks a lot in advance