Why are there 2 rundll32.exe?

I was checking over task manager and it shows 2 rundll32.exe! One of the rundll32.exe allows me to open the file location, end process … and all that when I right click on it and the other rundll32.exe will only allow me to perform administratiive tasks??? and it does not have a description or user name! neithr one uses really any memory, could someone just xplain all this to me??