Well you were right - EK has called me today but they don;t have any resolution for me.
I've spoken to three different people so far - two say "we just wanted to know you were planning to travel on both tickets" (i.e. OK)
And another telling me I was very, very bad and that they would have to deal with me tomorrow...
I have no idea what the problem is. I intend to 'fly' and use all the coupons.
Perhaps I should just buy a stuffed teddy bear/large parcel in CMB and say I bought it a seat of its own.