External harddrive changes name sometimes
If your hard drive mounted with a "1" at the end, that means the system was somehow holding onto the volume before you had plugged it in again, making it think another volume with the same name was plugged in. Since it can't give an identical path to two items, OS X will add a "1" to the end (which shouldn't be permanent).

As far as the NTFS question goes, I recommend reformatting your drive in a FAT format. If you are sharing with WinXP, use FAT-32. If you are sharing with Win7, use exFAT. Be sure to backup all data first as the reformat will wipe the drive. NTFS is read-only on a Mac which has obvious limitations for you.