Problems with source and medium filter

[Jason]

We have recently noticed a problem with the data being returned for a request with the following filters:

ga:source==google;ga:medium==organic,ga:medium==cpc

This should report data for traffic with the source of "google" and a medium of either "organic" or "cpc" and has worked without problem in the past.  This is now returning all zeroes for some domains (it seems to be limited to domains that have cpc traffic).

Interestingly, the following filters for the same domain return non-zero data:

ga:source==google;ga:medium==organic

ga:source==google;ga:medium==cpc

ga:source==bing;ga:medium==organic,ga:medium==cpc

Here is a full example request (with the profile id removed) that is failing:

https://www.googleapis.com/analytics/v2.4/data?ids=ga: 000000&dimensions=ga:date&metrics=ga:pageviews,ga:visits,ga:timeOnSite,ga:bounces&sort=ga:date&filters=ga:source%3D%3Dgoogle;ga:medium%3D%3Dorganic,ga:medium%3D%3Dcpc&start-date=2013-04-20&end-date=2013-05-19&start-index=1&max-results=1000

[Luis Pereira]

Not sure if it is related, but we also noticed a few weeks a ago an issue with the medium dimension. The following query which used to work fine started to return zero values for the AdWords metrics:

dimensions=ga:campaign

metrics=ga:visits,ga:impressions,ga:adClicks,ga:adCost,ga:CTR,ga:CPC,ga:RPC,ga:ROI,ga:margin

filters=ga:medium==cpa,ga:medium==cpc,ga:medium==cpm,ga:medium==cpp,ga:medium==cpv,ga:medium==ppc

sort=-ga:visits

Making further test we notice the issue was with the filter condition ga:medium==cpm

We took it out and everything started to work again. Really strange behavior. I didn't hear a word about it's explanation.

2013/5/21 Jason <jaso...@gmail.com>

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[Aaron Toledo]

Check to see if your data is sampling. Look for the 'containsSampledData' flag. If its True, trying reducing the date range. 

I don't think this part makes a difference, but try ga:source==google;ga:medium=~(organic|cpc)