duplicateMC and levels

[pheck]

I am trying to load in a bunch of rows into an MC that is not on my _root. Can anyone tell me why, when I export, I don't see 6 rows, when rowNum = 6 (I only see my initial 2)?

My hierarchy is as follows: _root > main > rowN (where N is 1 to rowNum; all of these rowN's exist within main). This code I have on my _root timeline:

for (i=3; i<rowNum+1; i++) {
	// start at row3 since rows 1 & 2 already exist
	if (i%2 != 0) {
		// if i is an odd number
		main.row1.duplicateMovieClip("row"+i, i);
	} else {
		main.row2.duplicateMovieClip("row"+i, i);
	}
	setProperty("row"+i, _y, (i*70)-70);
}

Is it that my "main" MC starts out only 2 rows high, and can't be extended after the fact? Thanks for any and all help.