Once you have a Newley created layered preset, go to PRESET MANAGE screen and COPY it to preset 001, overwriting whatever was there.
Now when you EXPORT this Preset to the HD it will be available instantly on 001 without going through the trouble of trying to locate it. Otherwise it will be a case of trying to find the original preset number that the layer was created in.
You can do the 001 EXPORT trick with all the presets you create and when you are ready to build a bank of presets you can load each one up in the order you want to use them, and then SAVE your new preset bank containing all the required presets
Working like this you can always go back to the exported single presets and create new banks that can be built in a predictable way.