Seagate and Verbatim portable hard-drives mysteriously renamed

I have two portable 320GB hard-drives: a Seagate FreeAgent Go and a Verbatim one.

Both have been working fine until a certain point where they have been mysteriously renamed everytime I mount them onto my Mac.

My Seagate hard-drive is named "FreeAgent Drive" and my Verbatim one is named "Verbatim Removable Hard Disk". However, my Mac automatically renames them as "FreeAgent Drive 1" and "Verbatim Removable Hard Disk 1" everytime I mount them.

The trouble is that I have to manually rename them back to the form without the "1", or else my BitTorrent programs would not be able to recognize the destination download folders located on my hard-drives.

Also, even though I have renamed them EVERYTIME I mount the drives, my BitTorrent programs still recognize the name of my hard-drives with even larger numbers, i.e. "Verbatim Removable Hard Disk 5". If I don't rename my hard-disk every time before I start my BitTorrent, it will not be able to find the destination folders.

Some time ago I have been downloading to the same hard-drive, but the programs recognize it has "Verbatim Removable Hard Disk 4". Since it now only recognizes it as "Verbatim Removable Hard Disk 5", whatever I've downloaded onto "Verbatim Removable Hard Disk 4" are unretrievable and nowhere to be found. The problem is that it took up my hard-drive space!

Last problem with the Verbatim hard-drive is that it used to be able to put files into Trash and then I manually delete them later. However, suddenly it forces me to delete whatever I move to Trash immediately. I cannot leave anything from the Verbatim hard-drive in the Trash at all, unlike my Seagate hard-drive.

Thanks to anyone who could help solve this madness!