It is very much normal.
As long as plants continue to grow and bloom well, there is nothing wrong with it.
I thinkg number of leaves has to do with multiple factors like breeding background, individual plant growing habits, plant size and growing environment.
My very first album maudiae (very loose term here as we know it) has an average of 3-4 leaves per growth when mature. This particular plant blooms twice a year. At times, a fan would mature with only two leaves and send up a spike.
I divided this plant in half leaving 3 or 4 fans each. One half (with a leading growing end) flowered as usual but was given away to someone. The other half without any leading growing end, skipped one year before flowering again. but it sprouted two fans, which is exciting because this plant always made one new fan each time. Now I get to see more flowers more often.
By the way, while it was bouncing back in that one year, each of the two fans grew more leaves than the plant ever had before. 7 leaves. hence taking longer before flowering again. now things are on schedule again.
My guess is that it needed more energy. This "old" half had literally old fans, which dried up and died, so plant had to make lots more leaves to make up for the loss.
Now, I also have other maudiae, one particular vini, makes about 4 leaves each time, but last time it flowered, that flowering fan had only two leaves.
I think this happens more often on the plants that flower "frequently".
Other maudiae I have that flower about once a year tend to make lots of leaves like 7 or more, hence taking a long time before a spike emerge.
These tend to have uniform and expected leaf size.
The ones that flower more often have leaf number and size quite variable I find. sometime big, sometimes not so big. but every time when it is time, they flower regardless of the leaf or overall fan size.