Yikes, clean that up quickly and get a new cap ASAP and see if that resolves your issue.
That burning hot coolant is not going to be good for your electrical if it is spilling all over your wiring, and from the looks of if there is dried up coolant on your loom there.
It is hard to mistake coolant for fuel. Maple syrup vs. fuel should be pretty clear. And as danthrax said, that recall is only for I believe 2002 WRXs, has something to do with modifying the fuel rails with a longer hard pipe and a shorter hose. Look that up in the Warrantee Issues forum, you can find it there.