That's correct but it also gives you the opertunity to either save the preset over the exisiting one when satisfied or to save them as a seperate preset step by step as development progresses. The last will give you the option to go back to the previous state as well. Once satisfied i can save that preset as my final preset in a later stage and delete the other presets that were in between.
Anyway this seems the only solution as you can not go back into the generated pages like you can do with some other WA extensions besides handcoding them.
Presets in this case are very welcome, at least for me they are.