Milo can be grown in rows or drilled.  It is generally in 30" most places. 

When you cut a milo plant with a cutterbar, the head is quite heavy.  As soon as it is cut, it falls.  Whichever way it feels like falling.  Some fall back into the header, some fall forward or sideward onto the ground.  With a rigid header (like you should be using for milo or wheat), the cutterbar is pretty close to the auger, so some of the heads which fall back into the head hit the auger and fall back forward, still ending up on the ground.  Heads on the ground are not a good thing from a grain farming standpoint, although the cattle do find them appealing. The milosavers stick out ahead of the cutterbar, providing something (other then the ground) for the heads to land on when they don't feel like falling in the desired direction. 

I can't see well enough in the pictures to tell what brand those milosavers are.  They look like they might be a product of plowgirl's great-grandfather's company, or they might be a cheap knock-off