xlswrite cell array of strings

Hi, I'm trying to write a vertical cell array of strings in Excel using the function xlswrite. When I run the code and open the Excel file, the first value of the cellstring is repeated in all the range and I don't know why. I'm using Matlab R2013a.

    RSCUT = {'P01INF';'P01INF';'P01INF';'P01SUP';'P01SUP';'P01SUP'};
    xlswrite('datos de entrada.xlsx',RSCUT,'Resultados','A5');

[Geoff Hayes]

David - I could not reproduce the above behaviour with R2013a or R2014a (there was no repetition of P01INF. What happens if you try the same code with a new (empty) Excel document, unlike the one that you have shown in the attached image?