I have two almost identical WebLists and both lists have a piHeight of 450

They are in the exact same place in the application and I change the pbRender property to show one or the other

For a reason I cannot work out one is rendered with one more row than the other pushing down what is under the list

I have tried swapping them in the code, rendering in a different order

They are as similar as they can be without being the same (otherwise I wouldn't need two)

What dictates how many rows a list should draw ?

As I say they are in the same place one on top of the other but they render differently. Odd