Toe, I feel for you, It is a proven fact, told to me from my PM Dr. that a pt on a long-acting opioid, should be medicated with a BT med as well, it should be equivalent to one third of your long-acting med.In this case you would still only be put on 10 mg of BT meds.
It seems to me, that they need to titrate your morphphine dose up 50 percent and then your BT meds would be at 20mg.

I would definitly be finding another Dr., especially if you have a legitimate injury. I will never understand why drs are so afraid of addiction, when the studies show, how rare it is. I believe the term they use for dr's that are afraid of prescribing opioids pain meds are referred to, as having "opio-phobia."

Good luck

Terri