duplicateMovieClip depths conflicting

Didnt pay much attention to depths until recently when diffrent mcs began to dissappear. I have several duplicateMovieClip commands, and usually set the depth to i the counter. However this causes problems

Is there a reccomended way of assigning depths to movieclips, I changed it to i + 10 and i + 50 as a temporary fix but can see conflicting occouring.

e.g

month_mc.duplicateMovieClip("month_mc"+i,i+10);

Any help or idea appreciated
thx :slight_smile: