I can link the tracers with their unique point and release them in the proper location:
0                           0                           9                        4
TIME                    TIME                   TRACER_4       TRACER_5
2017111.500    2017111.600     1000                500 
However, when I run the simulation they're listed separately within sheet_ave, so when I play the movie I can watch TRACER_4 or TRACER_5 - not TRACER_4 and TRACER_5 with one movie frame. Is it possible to include both releases within one movie?
One alternative I found was to add two locations to one reference title in the update bc file:
11  update_add       LarvalReleasingMB
    66:66       8:8         :    
    71:71    22:22       :
However, this method doesn't allow me to release different concentrations at each location (that I'm aware of).