I'm relatively new to this editor so if these seem stupid questions, they probably are.

I've downloaded a load of samples and have imported them into the editor, then saved that to the SD card. They show up on the list (in the editor) but when I load the file into the ESX, only so many of them show up - a load of them are missing.
The sample rates of the ones which are missing are all at the same sample rate as the ones which do appear on the ESX so I'm a bit puzzled by this.
Anyone know why they might not be showing up?
Also, thorough instructions on this thing seem to be pretty thin on the ground, does anyone know of any tutorials/guides for using the Open Electribe Editor?
Thanks in advance.