Received new piston rings recently to rebuild a second motor that I am putting into the landy temporarily while I rebuild the original. The rings that showed up are a different configuration than the ones i pulled out. From top to bottom there are still three locations on the piston to install the rings. The two at the top are clear, however, the bottom appears to consist of a funny crimped ring, a main ring that is groved for oil I believe, and two locking rings. I believe the order for the bottom slot is as follows:

Funny crimped ring installed into the depression in the piston.
Install bottom locking ring
Install larger groved ring above the bottom locking ring and around the funny crimped ring
Install locking ring.

Is this correct? Why are the rings different? Incidentally this is a .030 set.