Hello I'm new here

ops:
I bought a MP3/MP4 player from China off eBay a couple of months ago and all was fine (I only use it for is music since it's only 1GB).
A few weeks after I got the player, I tried adding more songs onto it but as soon as I did it removed all my songs (I only had 60 songs so I know I didn't use up 1GB already)....I tried to re-upload all my songs and now
the playlist is screwed up.
For example: I upload 40 songs onto my player, normally the playlist would look like this:
001-040 (the song being played now and the max number of songs)
But
now the playlist will be structured like this:
001-001
001-004
001-001
001-002
001-003
001-005
001-005
001-019
Basically, I still have 40 songs uploaded, but they're separated into smaller playlists - this means I have to manually change the song, making the Random (Shuffle) option useless.
Does anyone how to make it into one big playlist again?
Also, does anyone know how I can install the hardware properly? I wasn't given a CD when I purchased my player. :roll: