Can we discuss when a piece of code will create its own js script versus when it will be combined within the Launch embed code?
Here's a scenario we can use for this discussion:
1. I enabled the Facebook extension
2. I went to the Rules tab and opened my existing "All Pages - DOM Ready - Pixels" rule
3. I scrolled down to the "Then" portion of the rule and clicked the + icon
4. I selected the Facebook Pixel extension and the "Send Page View" action. I kept the default name of "Facebook Pixel - Send Page View" (see screen shot 1 below)
5. I went through the process of getting the changes to Stage. Stage is test1.hmkb2c.com for me
6. Looking at the Elements tab in Developers' Tools, I see that the FB pixel appears to be added to my Embed Code js (see screen shot 2 below)
7. I expected that the FB pixel would have made another js file - just like the other 2 rules in the "All Pages - DOM Ready - Pixels" rule (see screen shot 3 below).
I would just like to be educated on where to expect and look for rules 
Screen Shot 1 :: Added FB pixel to existing Rule

Screen Shot 2 :: Launch Embed Code

Screen Shot 3 :: Other JS files injected by Launch

Thanks -
Sarah