Difference between Cloud Base/Tops values and "VFR" graph appearance

[jjlj10238]

I use Windy Premium and load each upcoming flight track as a "FAVORITE" using the "VFR" setting.
As I look across the timeline it shows cloud formations in various shades of grey (usually darker shades near the terrain). The banner showing numerical values for cloud tops and cloud bases often suggest thinner layers (1700 and 500 = 1200 thick) than may be inferred by viewing the dark areas (often appearing up to 5000 feet thick). This is really important in the case of subfreezing conditions.
I assume that I should trust the numbers more than the visual appearance of the grey shading, but it would be helpful if the two representations were in better agreement.