Brian,
A problem with the plans in the Shipbuilder is that they are not Titanic. For the outside forward rooms on C-dcek the numbers are the same, thereafter they differ.
Also the Bathroom plans as shown on this web-site are wrong. The 10 forward bathrooms were a combined bath with toilet with athwartship passageways on the after-side of the bathrooms. The after bathrooms are as shown in the Shipbuilder and E&H with either an outside bathroom or an outside toilet, with the latter entered from the former and not as with the Parlour Suites and Suites of Rooms from a passageway running between two bedrooms and with wardrobes rooms inboard of the passageway.
Christa,
If you use the plans on this site C-86 is the room just forward to the 3rd bathroom counting forward from 2nd Class on the port-side.
But as noted above that bathroom as with those aft of it and the matching starboard-side ones are not single bathrooms, but two bathrooms and two toilets [with no wardrobe rooms] serving the rooms forward and aft of the bathroom/toilet complex. C-86 had an outside bathroom and an inside toilet.
Hope that helps.