.bvh file exported from blender CHANNEL 3 and CHANNEL 6 differences

I’m working on blender and I export the file as .bvh and then I use the file in another application. The problem it doesn’t work properly. So after investigating I found that I have to change the CHANNELS 6 Xposition Yposition Zposition Zrotation Yrotation Xrotation to CHANNELS 3 Zrotation Yrotation Xrotation except for the ROOT Hips to make the program work properly. Could anyone please advise and explain to me what is the difference between CHANNELS 6 and CHANNELS 3? and what may be the reason behind my application to work with all JOINTS (except the ROOT Hips) to be CHANNELS 3 and not working if they are CHANNELS 6.
Here are the two files:
1- All joints are CHANNEL 3 except for the ROOT Hips (working case)

HIERARCHY
ROOT Hips
{
    OFFSET 0.040491 1.932390 0.067399
    CHANNELS 6 Xposition Yposition Zposition Zrotation Yrotation Xrotation
    JOINT LHipJoint
    {
        OFFSET 0.000000 0.000000 0.000000
        CHANNELS 3 Zrotation Yrotation Xrotation
        JOINT LeftUpLeg
        {
            OFFSET 0.711601 -1.252568 0.436429
            CHANNELS 3 Zrotation Yrotation Xrotation
            JOINT LeftLeg
            {
                OFFSET 0.614133 -4.186182 -0.012550
                CHANNELS 3 Zrotation Yrotation Xrotation
                JOINT LeftFoot
                {
                    OFFSET 0.638700 -4.353626 -0.013052
                    CHANNELS 3 Zrotation Yrotation Xrotation
                    JOINT LeftToeBase
                    {
                        OFFSET 0.049854 -0.234426 1.172005
                        CHANNELS 3 Zrotation Yrotation Xrotation
                        End Site
                        {
                            OFFSET 0.008039 -0.000628 0.602731
                        }
                    }
                }
            }
        }
    }
    JOINT RHipJoint
    {
        OFFSET 0.000000 0.000000 0.000000
        CHANNELS 3 Zrotation Yrotation Xrotation
        JOINT RightUpLeg
        {
            OFFSET -0.921803 -1.099637 0.446653
            CHANNELS 3 Zrotation Yrotation Xrotation
            JOINT RightLeg
            {
                OFFSET -0.443529 -4.291903 -0.017251
                CHANNELS 3 Zrotation Yrotation Xrotation
                JOINT RightFoot
                {
                    OFFSET -0.457313 -4.425303 -0.017787
                    CHANNELS 3 Zrotation Yrotation Xrotation
                    JOINT RightToeBase
                    {
                        OFFSET -0.051702 -0.315656 1.210025
                        CHANNELS 3 Zrotation Yrotation Xrotation
                        End Site
                        {
                            OFFSET -0.010036 -0.001485 0.627272
                        }
                    }
                }
            }
        }
    }
    
    }
}
MOTION
Frames: 0
Frame Time: 0.041667

2- The raw exported .bvh file, where many of the joints are CHANNEL 6 (not working case)

HIERARCHY
ROOT Hips
{
    OFFSET 0.040491 1.932390 0.067399
    CHANNELS 6 Xposition Yposition Zposition Zrotation Yrotation Xrotation
    JOINT LHipJoint
    {
        OFFSET 0.000000 0.000000 0.000000
        CHANNELS 6 Xposition Yposition Zposition Zrotation Yrotation Xrotation
        JOINT LeftUpLeg
        {
            OFFSET 0.711601 -1.252568 0.436429
            CHANNELS 3 Zrotation Yrotation Xrotation
            JOINT LeftLeg
            {
                OFFSET 0.614133 -4.186182 -0.012550
                CHANNELS 6 Xposition Yposition Zposition Zrotation Yrotation Xrotation
                JOINT LeftFoot
                {
                    OFFSET 0.638700 -4.353626 -0.013052
                    CHANNELS 6 Xposition Yposition Zposition Zrotation Yrotation Xrotation
                    JOINT LeftToeBase
                    {
                        OFFSET 0.049854 -0.234426 1.172005
                        CHANNELS 6 Xposition Yposition Zposition Zrotation Yrotation Xrotation
                        End Site
                        {
                            OFFSET 0.008039 -0.000628 0.602731
                        }
                    }
                }
            }
        }
    }
    JOINT RHipJoint
    {
        OFFSET 0.000000 0.000000 0.000000
        CHANNELS 6 Xposition Yposition Zposition Zrotation Yrotation Xrotation
        JOINT RightUpLeg
        {
            OFFSET -0.921803 -1.099637 0.446653
            CHANNELS 3 Zrotation Yrotation Xrotation
            JOINT RightLeg
            {
                OFFSET -0.443529 -4.291903 -0.017251
                CHANNELS 6 Xposition Yposition Zposition Zrotation Yrotation Xrotation
                JOINT RightFoot
                {
                    OFFSET -0.457313 -4.425303 -0.017787
                    CHANNELS 6 Xposition Yposition Zposition Zrotation Yrotation Xrotation
                    JOINT RightToeBase
                    {
                        OFFSET -0.051702 -0.315656 1.210025
                        CHANNELS 6 Xposition Yposition Zposition Zrotation Yrotation Xrotation
                        End Site
                        {
                            OFFSET -0.010036 -0.001485 0.627272
                        }
                    }
                }
            }
        }
    }
}
MOTION
Frames: 0
Frame Time: 0.041667