: Two GA codes on one site and the data doesn't match Our company puts a GA tracking code on each of our websites (we build websites for companies and then provide GA tracking for the company).

@Steve110

There are quite a few reasons why two trackers would differ, the least of which being tracking via JavaScript is never a perfect science.

Some other instances are:


some users closed the browser before the second GA tracker was
loaded
some users have blocked analytics.js from all sites (there are
browser plugins that do this)


At the end of the day, getting something like this to tally is a fool's errand.

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@Hamm4606531

When you have multiple GA trackers on the page, you need to make sure that you assign a unique name to each tracker, so that whatever hits you send will be sent to the correct GA property.

For example, if you send in an event hit and you haven't named your trackers, that event hit could potentially be sent to both properties because they have the same name (default name is usually t0). This then leads to skewed results.

You can refer to this documentation as a starting point for how to work with multiple trackers: support.google.com/analytics/answer/1032400?hl=en
Edit: If your trackers are of different technology (ie. classic GA and UA), then you may not necessarily get exactly the same data simply because of how different the two trackers collect and process data. Slight differences in data should be expected.

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