When I use the bell hammer spray, when I fold up the nozzle, there is something like a jet at the base of the nozzle as well, and it seems to spray from both sides. Am I using it incorrectly?

The nozzle of the bell hammer sprayer has a 2-way specification, so different spraying is possible depending on whether you fold it completely or pull it up completely.
It is also possible that the cap may have been improperly molded, in which case please contact us. In this case, please contact us and we will replace the cap part.