Set the one with the black background to
ADDICTIVE
128
Did you do that on purpose?
Sure, mapping can be addictive, but the rendermode is still called 'additive'.
Which comes from adding something. The color values of the sprite are added to what's behind it, so it results in a glow effect.
Most people misunderstand it as a 'the brighter, the more opaque', which is just wrong.