DFA Tags firing twice
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!