Sometimes when seperating/ splitting the bulbs individually as dormant procedure commences growth will emerge on each sep bulb as opposed to just one or possibly two growths when remaining in a cluster/ group. Its not an exact science though as if anything ever is and when left in a group the plant decides to discard bulbs when it sees fit anyway when the storage of nutritients and moisture has been exhausted. IMHO a young plant with 2/3/4 small bulbs is not mature enough to split individually especially when running the risk of the divisions rotting like paphio says. It is also necessary to consider that with the catasetinae short growing period many circumstances that come along or crop up cause considerable hinderance such as root rot/ pest attack. The plant will need the reserves of its spare bulbs to carry it through to the next grow season sustaining it at all times through the dormancy beforehand. Have seen many a sellar flogging small single bulbs on trade/ auction sites and some shrivelled on brink of life. Chances of success nurturing these are lessened considerably unless you can guarantee perfect conditions such as a lab.