My friend lives their and we were talking this weekend and I knew they were in Tustin (tbut Irvine schools, but he was mentioning that the bond they pay is TUSD, which seemed odd to me. They are in Columbus Grove (so Tustin Address, but Irvine schools) and all of the school's are clearly established (in fact, in some cases, they were the same schools him and I went to when we were kids).
Just seems really odd that you are going to a school district that differs from the one your bonds are backing. In Orchard Hills, if you live in Strada and are in Irvine district, you have irvine CFD and if you are in TUSD district, you get their mella.