If this is sort of an investigation.. you can create multiple segments to compare side by side...
So if I understand, you have:
- an eVar which is used in multiple places (I am going to assume it's also a VISIT level expiry)
- an event which is fired on a subset of places, also in correlation with the eVar (or so you hope)
Now, when you are setting the event, I assume you are also setting the eVar (as in you are not relying on the VISIT attribution to set the value)
So to see the event in isolation, you can create a segment like:
HIT
eventX exists
Now if you need to see explicitly where the eVar is set, and not just by VISIT level attribution, you can create a segment like:
HIT
eVarY exists
AND
eVarY Instances exists
^ The instances of the eVar is a specific metric that is set only when a value is specifically passed to an eVar, but not when the value is carried forward by attribution.
Then, the last part, you can either stack those two segments on top of one another, or create another segment for:
HIT
eventX exists
AND
eVarY exists
AND
eVarY Instances exists
Then you can compare where you potentially have mis-matched tracking