What is the difference between these two iMA calls?

 
iMA(NULL, 0, n, 0, MODE_SMA, PRICE_CLOSE, i + n / 2 + 1);

iMA(NULL, 0, n, n / 2 + 1, MODE_SMA, PRICE_CLOSE, i);

I can't think of any difference, yet when I plot them, they look different on charts.

Any help understand the difference is appreciated.

Thanks in advance,

Edwin

 
integer divided by integer