You have to declare ALL fields in your condition, like this:
if({nm_status} == "Encerrado")
{
sc_field_style({cd_loja}, "#2fe2ff");
sc_field_style({cd_pedido}, "#2fe2ff");
sc_field_style({dt_emissao}, "#2fe2ff");
sc_field_style({dt_encerramento}, "#2fe2ff");
sc_field_style({total}, "#2fe2ff");
sc_field_style({desconto}, "#2fe2ff");
sc_field_style({total_final}, "#2fe2ff");
sc_field_style({razao_social}, "#2fe2ff");
sc_field_style({nm_status}, "#2fe2ff");
sc_field_style({usuario_cad}, "#2fe2ff");
sc_field_style({cd_vendedor}, "#2fe2ff");
} else if({nm_status} == "No Caixa")
{
sc_field_style({cd_loja}, "#FFCC00");
sc_field_style({cd_pedido}, "#FFCC00");
sc_field_style({dt_emissao}, "#FFCC00");
sc_field_style({dt_encerramento}, "#FFCC00");
sc_field_style({total}, "#FFCC00");
sc_field_style({desconto}, "#FFCC00");
sc_field_style({total_final}, "#FFCC00");
sc_field_style({razao_social}, "#FFCC00");
sc_field_style({nm_status}, "#FFCC00");
sc_field_style({usuario_cad}, "#FFCC00");
sc_field_style({cd_vendedor}, "#FFCC00");
}
And put this in onRecord event.