Ok so I figured it out. It was a multy pronged issue where A) The sphere was not large enough and B) The characters that could overlap it were moving too closely together and would block other units from making an overlap. (Its an RTS game and this is a routing system).
Even though the units were told to move to the spheres location (its exact center) upon click of the sphere, they would stop short sometimes after getting blocked by other units and would be content even though they weren’t EXACTLY at the spheres center. (I couldnt tell because my camera is zoomed out to a top dowm isometric perspective) I made the spheres small because I wanted the units to only move to their next location after moving to precisely the prior location, not just near it, but I overdid it and they were occasionally stopping short after a random block from another unit.