Felpro Oil pan rubber seal seems too big

Those rubber end seals go in the pan first, then the cork over the top.

Big blocks don't use seals like those.
Thats how both my FSM's suggest it. But the gasket is just too big.

Feels like my options are to either fill the gap with a bunch of RTV (highly problematic), try another rear seal gasket, or buy the one piece.

Appreciate the input all. Glad im not the only one whose had this issue.