Where you should be, assuming a 30" arrow back of point. Add 5# per inch over 28" draw lenghth, add 10# for recurve, would make a 75# wood arrow. Conversion to carboneros:26/x*1.2115=75
x=26/75*1.2115= 0.42 deflection.
I have no idea why they recommended such stiff shafts.
So a 400 is slightly stiff, but I assume you are shooting full length? That makes most likely the difference.
And no, there is no way of refletching without tearing up the white foil wrap.
Just get some fresh ones from onestringer.com and refletch. I still think a little more fletching won't help much.