Flex Phraser presets

Yes you can load factory Phraser presets and alter, but it seems you can’t alter the FlexPhraser that’s in a factory patch. You have to call up a preset, but that sounds completely different than what’s already there. To clarify, I load a patch that has a FlexPhraser going, I can’t alter it, its greyed-out. I have to select the ‘user’ button, which completely changes the FlexPhraser and the sound. I want to just slightly alter what they have already. Make sense?