The other institutions are all state institutions so "USCLA" can't be USC, but could be a typo for UCLA as you suggest. But are there separate endowments for the various UC campuses, or one large endowment for the whole UC system? There's no UC campus in Oakland, but there could be some office located there that controls the endowment.
From this article it looks like there are separate endowments for each UC campus. Probably the alumni from Berkeley and UCLA give specifically to their schools, and not to UC Irvine.
I don't know how it works, but if you look at football Berkeley and UCLA are in the PAC-10, and the PAC-10 shared their football revenues with each other (including USC, Washingtonx2, Arizonax2 & Stanford) but I don't think UCLA and Berkeley had to share with the other UC schools.