I wouldn't worry about the server load too much. On the other hand if you start to experience lag or anything else, you may want to contact the host to find out about it. However depending on the server hardware that load seems fine to me. The memory usage may be high due to backups.
That server load isn't to bad as HostFrog says, it could be you are one of the last accounts on a server and if so that load is fine. If they keep adding accounts to it that could be a problem for a 2 cpu server.
Just keep an eye on it, and if it gets to high start asking your host about it.
I agree with HostFrog. You dont really have to worry as long as everything seems to be loading fine. However if you start noticing lag or loading problems you should contact support as soon as possible.