Front breather leak.

Hey there! I just got home from a couple day trip. Got home and one of my front breathers is kinda spewing. I'm not sure which one is the culprit to be honest.
What gets me is I barely used 4x.
What's the deal, and what's the second breather?
Manual trans? T case?

 

You’ve simply over filled the front diff a tad, nothing to worry about it’ll work itself out the vent. Second one is a vent for the front 4wd actuator.

 

Thx. I kinda came to that conclusion, it was weirding me out because I did the fluids over a month ago and hadn't had an issue tell now, but a buddy pointed out I'd also done a pretty drastic elevation change of +5700'.