Make a sprite's alpha channel value not stack on itself?

Best way to describe:

2 of the exact same sprites. With a color value of 255, 255, 255, 100

When these two transparent sprites get on top of each other, their transparency values add to make 200, making their collided area less transparent. Like a venn-diagram.

Is there a way to prevent the transparencies from adding on top of each other when they cross over each other?

Use a layer. Make the objects not be transparent at all, instead make the layer they're on transparent.