DFA Tags firing twice

Question

Hi everyone,

We have implemented a DTM rule to fire our floodlight tags. We are using a Page Load Rule and a Sequential Javascript:

var axel = Math.random() + "";

var a = axel * 10000000000000;

var b= _satellite.getVar('PageURL');

document.write('<iframe src="https://5118100.fls.doubleclick.net/activityi;src=5118100;type=footer;cat=foote0;u24=' + b + ';dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;ord=' + a + '?" width="1" height="1" frameborder="0" style="display:none"></iframe>');

However, when we debug, we notice that there are two tags that fire with a minor difference:

One tag has the following variables:

and the other fires without the dc_pre variable:

Is there a reason for this? Is there a way we can do away with the other tag fire? What is the dc_pre variable?

Any help would be appreciated.

Thanks!

jdonley · Accepted Answer

This is definitely not an issue with DTM functionality.

This seems to be just how Floodlight tagging works. Searching around on the internets, I found that a lot of others have asked this same question about floodlight tagging (regardless of how it is deployed, e.g. GTM vs. DTM vs. directly on page). I could not find an explicit, definitive, or official answer about why it does this, though. But I did find some interesting theories, namely in this thread:

https://www.reddit.com/r/adops/comments/5d1okp/fl_tags_question/

aseelund · Answer

The first one is probably a 302 redirect, check to see if that's the case. The second would result in a HTTP Status code of 200 if this is true.

If so, this isn't firing twice or duplicating data, its just redirecting in google.

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