It appears these folks have been upgraded. Are you one of them?

Customers Upgraded into First Class:
CAP, J. 6E
IVE, S. 1A
YAF, A. 2F
ZAP, A. 3A

This flight is a difficult to get an upgrade. Though you should still be close to the top. There is no one else waiting on the list.
I suggest you call Continental.com support and see why you are not showing up as "upgrade standby".