Your kites invert as they don't have enough pressure. Use the guage on the SS pump when its new and get used to the sound of the LE when you flick it (guages rust with salt,sand and time).
I pump to 8-10 psi so its ROCK solid. Shouldn't give you problems with those pressures.
BW's are tuned up Octanes based on the REV's from 2008-9. BWs are flatter, so maybe a bit more power but slower for sure. I loved the 11m Octane but rode it again after a year on Rally's and didn't feel the love anymore.
Nothing to do with pressure. I have a 12/9/6 2012 rally quiver. I have had the 12 and 9 invert
Multiple times no matter how hard it is pumped. Not a problem when I am riding waves because I don't crash the kite but for trying to learn new tricks and the kite is crashed it's a problem. Love the kites in all other aspects but I personally think that the relaunch sucks (some of the time)