name of instruments when exporting

I finished a score for 4 cellos. I named each violoncelo 1, 2, 3, 4 but when I export it appears violoncelo, violoncelo (1), violoncelo (2) and violoncelo (3). I already named each one again, substitue again, closed and reiniciated the progrtam, saved and it doesn't change. I don't know what to do.