Incorrect Output Pin Channel Count

Hi DSP Concepts,

I was developing a custom module, and wrote the _module.m script like this:

PT_AudioIn1=new_pin_type(12, 32, 48000, 'float', 0);
PT_AudioIn2=new_pin_type(1, 32, 48000, 'float', 0);
PT_AudioIn3=new_pin_type(1, 32, 48000, 'float', 0);
PT_AudioOut1=new_pin_type(2, 32, 48000, 'float', 0);
PT_AudioOut2=new_pin_type(12, 32, 48000, 'float', 0);
add_pin(M, 'input', 'AudioIn1', 'AudioIn1', PT_AudioIn1);
add_pin(M, 'input', 'AudioIn2', 'AudioIn2', PT_AudioIn2);
add_pin(M, 'input', 'AudioIn3', 'AudioIn3', PT_AudioIn3);
add_pin(M, 'output', 'AudioOut1', 'AudioOut1', PT_AudioOut1);
add_pin(M, 'output', 'AudioOut2', 'AudioOut2', PT_AudioOut2);

And after I created a layout and connected the custom module, the number of channels of the output pins are different from the declaration:

As shown in the screenshots, the AudioOut1 is shown as 12 channels and AudioOut2 is shown as 1 channel. However in the TestInOutChannels_module.m script, AudioOut1 is declared 2 channels and AudioOut2 is declared 12 channels.

Could you please help me find out where the problem is?

I have attached my whole testing project in this post.

Thanks.