Charticulator not representing Mark height correctly based on data

Hi, I am trying to plot the following stacked graph on Charticulator; a sample of the dataset is shown below.

The x-axis is Day-Shift and the y-axis is Time adjusted. The fill colour of the mark is based on the State column. I have entered the Duration column as the height for the Mark, but the actual height of each Mark does not correspond to the corresponding Duration value. For example, the first Duration value (8880) is not represented correctly in the chart. The blue mark should have a height of 8880 but it seems to end at around 1500.

Is there anything that I'm doing incorrectly? Any support would be much appreciated.