Lane412000,
First of all I would like to apologize for any misinformation you may have been given originally.
Delta3MM is correct. If you return the hotel portion of a 086 travel package you are only entitled to a portion of the points (in this case 50k). Depending on how many points you have in your rewards account, I do have two suggestions.
Two 3 night rewards (036's) would cost you 156k points. However, if you order the UK/Ireland Sampler Reward (564) you would receive one 3 night reward and two 2 night rewards for 150k points. That way you could use the 3 night reward for one room and put the additional 4 nights together to get the second room.
You could also just keep the travel package reward and use 78k points or pay for the second room. Again, it just depends on your balance and what you prefer to do.
Whatever you decide, I would recommend contacting Marriott Guest Services at the toll free elite line located on the back of your membership card.
Sincerely,
Chris