Multiple render tarjets doesnt work when I draw with blend activated?

Hi, In my render I use multiple render targets normally, but when I am drawing with blend activated (blend in fact works) multiple render targets seems not works, values seem that are always discarting, why?

Are you using dual-source blending (a blend function using one of the *_SRC1_* factors)? The maximum number of draw buffers may be lower when dual-source blending is used; the limit can be queried via GL_MAX_DUAL_SOURCE_DRAW_BUFFERS, and isn’t required to be greater than 1.

I am using this value:

I dindt know that this parameter could change MRT :confused:

My apologies I misconfuse your response, no I am not using two different output sources for alpha color.