Epi. radicans (and other reed stem hybrids) are known to sprout keikis from the top of the cut spikes.
I personally remove the keikis from the top since they produce smaller and less attractive flowers compared to new canes from the base of the plant.
Leaving keikis to grow from the top of the plant also results in an unkempt and ratty appearance. The top keikis also divert energy from the plant so it cannot produce as vigorous basal growth compared to a plant with no keikis.
You can pot the keikis separately and in time they should reach the same size and vigor as the original plant.
Soon enough, you will have a forest of Epi. radicans that you will just prefer to toss the keikis into the compost because there are too many.