Why does same program requires yum update on one machine but not another?

I have cpio-2.11-25.fc20.x86_64 installed on two machines:

This program does not require an update on the first machine, but I was presented with a higher version 2.11-28.fc20 on the second machine. To be certain that it is not a timing issue, I did yum update again on the first machine, and was presented with:

# yum update
Loaded plugins: langpacks, refresh-packagekit
No packages marked for update

Why does same program requires an update on one machine but not another?