Heyo!
As part of the main article detailing the RB we detailed a similar situation:
If, for example, a branch has parallel lines that reach Tier X, such as the Soviet destroyer branch, you can choose which of the lines to reset.
If you decide to reset the branch of Soviet destroyers starting from X Grozovoi, it will be reset to VII Minsk, then to II Storozhevoi, and then cruiser II Novik.
At the same time, you'll be able to reset the second branch from X Khabarovsk on the same principle, but in this case, bonuses will be received only by X Khabarovsk, IX Tashkent, and VIII Kiev.
So, if you reset your Worcester, it would reset that line down to T1, however you would keep: Pensacola, New Orleans, Baltimore, Buffalo and DM.
If you then reset your DM line, you would only receive bonuses on: Pensacola, New Orleans, Baltimore, Buffalo and DM.
Fem,