The hard part is trying to use words with Australian (read UK) English. Discrete is correct down our end of the world, however:
SUGGESTIONS:
-> Ad Text: Your ad text includes phrases that do not meet our grammar requirements. I suggest making the following change(s):
Current: "Discrete"
Replace with: "Discreet"
Australian searchers will think, gee this guy can't spell, how bad is his site going to be?
Keep the URL of the online Macquarie dictionary handy for editorial debates - it's no longer free but Google probably has a subscription.