is this normal growth

hi all.
i have 5 white shark plants,4 weeks into bud.
take a look at the pictures & see the 1 leafs growing out from the top of the plant.also the plant looks like its had a growth of about a inch on the 2nd plant in (on the pic) also zoomed.
is this normal for these plants to do this or is it something im doing wrong.
the plants havnt been topped either & i see the stem is growing to a point.maybe the stem isnt big enough to hold a 3 leafed arm.