Today, we deploy December 2013 CU and PU for Project Server 2010. After completing the binary installation, our patching process can not continue because the farm shows missing KB2553430 (December 2013 PU) in one of the server. I don't see any technical reason why it happened, so I went through following work-around
Re-run the installation package using PACKAGE.BYPASS.DETECTION.CHECK=1 option (more info here). Result : unsuccessful, the impacted server is still showing that it doesn't have KB2553430 Extract the installation package and install the *.