I can't comment on the specific sail or masts, but check out the IMCS for the mast and the IMCS recommended for the sail. IMCS is the measure of "bendiness".
The amount of carbon doesn't directly influence the bend characteristics - it's the IMCS you need to keep an eye on. More information here:
www.seabreeze.com.au/forums/topic.asp?whichpage=-1&TOPIC_ID=36902&REPLY_ID=226013If the IMCS of the mast and sail match, then you're probably ok.
I suggest that you check that the mast cap on the sail (if it has one) is in the correct place. I have before now had to use loads of downhaul because the cap was 5cm further out than it should have been!
Another option is to check the mast extension you're using. I use a Chinnook extension on Naish sails, and always have to use at least 2.5cm less extension than the sails recommend - I believe it's because of the mismatch between manufacturers.
In addition, I don't tend to outhaul my sails until the battens are all behind the mast - you may be applying too much.
I suggest that you experiment and rig it as per the recommendation and try that - see how it feels...
Actually, I'd also definitely take it into the shop you bought it from and ask for their advice - I'll bet they've got some answers for you.
Don't take too much of the above as gospel - I'm no expert on rigging (I know how to put my gear together, but that's about it), and I have no experience of the Blade. Seeing as you're in WA, you could probably get straight onto Severne themselves - I'm sure they'll sort you out.
Let us know how you go - be interesting to find out what the deal is.