Cell tracking is inherently difficult, here is an example of how it can lead to conflicting data. Notice the two cells to the in the upper left image.  These cells congeal in the image below.

We both had timeseries set on the individual cells above.  When they combined the resulting time series of each did not seem to match each other.

What this means is that when you are looking at time series of merging storms, you will need to reset your point for the time series to work and be aware of what is going on when you use the data.

MacGyver and Cattywampus