Analog Lab uses it's own presets. It's not the same the individual applications use.
So if you edit a preset, then you shall save it in Analog Lab using "save" or "save as" at the top of Analog Lab applikation.
You can for instance - thru "Edit" in the "Filter view" in Analog Lab - select a preset you have made in a original app like for instance ARP 2600, and then save this preset in Analog Lab using Analog Labs save preset options.
You can also edit a sound this way and then save the edit's as a preset in Analog Lab.
You can read this section in Analog Lab's manual "4.2.4 Saving a User preset". More about save possiblities in the manual.
You find the manuals here:
http://www.arturia.com/support/downloads&manualsThe point is, that a preset you made in a original synth don't appear in Analog Lab because it's in the original synth. You also have to save the preset in Analog Lab thru the edit original app in Analog Lab as the presets in Analog Lab is it's own.
Hope this help.