U did the right thing. In the 1st place your Trike will stop faster that the 2 wheeler so u will not run over them. You should be in the back because of this reason. RIDE YOUR RIDE always . And true if you don't keep 2 bike lengths you will be braking and accelerating constantly. The bike behind you should be told to do the same . , in a group 2 or even 3 bike lanes is a good rule to follow. Also you should never stagger lanes with a trike.