Issue

yum --exclude includes installed rpms in the result set even if the --exclude option specifically asks to include that rpm.

For example: without --exclude

# yum provides "libreadline.so.5()(64bit)"
compat-readline5-5.2-17.1.el6.x86_64 : A library for editing typed command lines
Repo        : production-rhel-x86_64-workstation-6.5
Matched from:
Other       : libreadline.so.5()(64bit)



compat-readline5-5.2-17.1.el6.x86_64 : A library for editing typed command lines
Repo        : installed
Matched from:
Other       : Provides-match: libreadline.so.5()(64bit)

And using --exclude

# yum --exclude=compat-readline5 provides "libreadline.so.5()(64bit)"
compat-readline5-5.2-17.1.el6.x86_64 : A library for editing typed command lines
Repo        : installed
Matched from:
Other       : Provides-match: libreadline.so.5()(64bit)

Still the "installed" compat-readline5 package is showing though we excluded it .