Paraview Output Data Issue

Hello Paraview users,

I am currently using REEF3D and visualizing my simulation results through Paraview. In dealing with 3D problems, I have used filters to select “Integrate Variables” in data analysis, obtaining water level data for contour2’s 2D plane. However, I’ve noticed that the output data count doesn’t match the grid count, and this is only for the first timestep.

During my calculations, I may have tens of thousands of timesteps, and I’m seeking advice on how to obtain water level data for the entire timestep or at regular intervals. The goal is to reconcile the data output with the grid count.

Thank you for your valuable suggestions.