KMLLayer-based map sometimes places point placemarks behind the NC polygon, making them unclickable

[fiveham]

So far I've observed this problem with the NC background layer placed first and partially with it placed last.

With the NCBG first, points from both the E and the W files were ignored on click in favor of the polygon.

With the NCBG last, points from the E file were clickable but points from the W file were not.

Sequence	Result
B E W	BG is in front of E and W
B W E	BG is in front of E and W
E B W	BG is in front of E and W
E W B	E in front of B in front of W
W B E	BG is in front of E and W
W E B	BG is in front of E and W

[fiveham]

Setting zIndex options with the bg lower than the icons fixed it.