Legend colors do not correspond to raster values

[TainaMartins]

The maximum value in my raster is 21177 and it is shown in dar blue in the map. This should be the value at the right of the horizontal color bar, which is dark blue.

However, ArcGIS is incorrectly showing the 21177 value in the green part of the color bar.

[AubriKinghorn]

That's not good. Can you show the properties for the legend item? I'm curious how the labels set to be displayed. 

[TainaMartins]