I don't know that this is is BEATING your normal flowering time, but it sounds like they are just advising harvesting too early to me - which I THINK would just ruin the bud?

Which unit do you have, and how do you keep the plants from growing too tall and forcing you to harvest early? Do you like your unit?

Here is the link to the instructions I mentioned so you can check it out for yourself:

Sunlight Sheds Hydroponics Systems

(Click on "video media" from that link to see the video)