how it's possible a package installed twice

[alvandrood]

Hello

We have a server that it's OS is Redhad Enterprise Linux 4 64bit , we have a problem in this server (this is related to our database) when I checked the packages that are necessary for the database I found out that some packages have been installed twice , it means that when I run this command "rpm -qa" for some package I see tow results for example
# rpm -q compat-libstdc++-33-3.2.3-47.3
compat-libstdc++-33-3.2.3-47.3
compat-libstdc++-33-3.2.3-47.3


I don't know how it's possible that some packages have been installed twice , I think that it may be related to our problem

do you know how a package can be installed twice ?

thanks

[Roxoff]

Is this a 64 bit server? You may have the 32-bit and 64-bit versions of some packages installed side-by-side. This is quite important if you need to run 32 bit versions of some applications. This would happen, for example, if there is only a 32-bit version available.