Why is a number appended to the volume name on external hard drive, only in path?

Last week I replaced a failing external drive. Using Disk Utility I partitioned it into two volumes, named them CCC and Warehouse (Warehouse is the problem). I had never had any volumes named Warehouse previously. In Finder the name shows correctly, until I click "Get Info", where the name is shown as Warehouse 1. All of the files on Warehouse show their paths as /Volumes/Warehouse 1. I don't know when the " 1" was appended to the name, or how it happened. It's screwing up my applications that write to or from the volume, the path is wrong. When I'm in Warehouse's "Get Info" I try to change the name back to Warehouse, but it immediately goes back to Warehouse 1. I copied everything off the drive, repartioned using the same names, and still have the problem. I notice if I change the name to something totally different, like "Fish", I don't get that problem. I would prefer to keep the name Warehouse though, if possible.