C : Unidentified if evaluation issue

This is kinda more complicated than that, but for short, I am trying to create a consensus sequences for families of sequences (strings made only out of A, C, G and T characters), and I can't identify where the function I made fails. Here it is :

SEQUENCE calculate_cons(FAMILY FAM)
{
    SEQUENCE cons;
    int maxlenght=seq_with_max_char(FAM);

    for(int i=0; i<maxlenght; i++)
    {
        int nA=0;
        int nC=0;
        int nG=0;
        int nT=0;

        for(int j=0; j<FAM.size; j++)
        {
            if(FAM.seq[j].c[i]=='A')
            {
                nA++;
            }
            if(FAM.seq[j].c[i]=='C')
            {
                nC++;
            }
            if(FAM.seq[j].c[i]=='G')
            {
                nG++;
            }
            if(FAM.seq[j].c[i]=='T')
            {
                nT++;
            }
        }

        if((nA==nC) || (nA==nG) || (nA==nT))
        {
            cons.c[i]='.';
        }
        else
        {
            if((nA>nC) && (nA>nG) && (nA>nT))
            {
                cons.c[i]='A';
            }
            if((nC>nA) && (nC>nG) && (nC>nT))
            {
                cons.c[i]='C';
            }
            if((nG>nA) && (nG>nC) && (nG>nT))
            {
                cons.c[i]='G';
            }
            if((nT>nA) && (nT>nC) && (nT>nG))
            {
                cons.c[i]='T';
            }
        }
    }

    cons.lenght=maxlenght;
    cons.ispartfam=true;

    return cons;
}

The issue : With this code, consensus sequences are only be made out of 'A' and '.'. As an exemple, if a family contains :

TCCTATGGAATCTTTTTA

TTCTATGGAATCTTTTTA

The consensus sequence will be :

....A...AA.......A

The function writes '.' when there is not 2 times A, and it writes 'A' otherwise. The line where it fails is probably if((nA==nC) || (nA==nG) || (nA==nT)) since if I compare with nC, the consensus family will only contain 'C' and '.'.