If you haven't flown yet, then that sounds about right.

Having said that the fare to HKG allows the routing to be HKG-BKK-DXB-VCE with stopovers allowed. Same thing is the fare to BKK allowing BKK-HKG-DXB-VCE routing.
With you having to go from BKK that means you could fly BKK-HKG then HKG-DXB with EK on the same ticket and be able to catch your non stop flight in HKG (I think they connect from memory). Provided there is availability in your original fare bucket for BKK-HKG, HKG-DXB-VCE you will only have to pay the 100 euro reissue fee.