So, after Mike's comment, and doing some of my own research, I have found that Robert Bly, the great poet, was wrong in his descriptions of ghazals. And therefore I was wrong. I apologize. But - this is good news - I think our way is better.
So a correct ghazal is a poetic collection of Shers. A Sher is a two line poem, with an exact meter called Beher . A Ghazal then is a series of two line poems, and each end with the same word or set of words.
But it only required a cursory examination of the couplet Ghazal to see that two lines was one too few. The problem of the repeated words becoming monotonous was already lingering when I considered the 3 line ghazal, but when words and rhythm was carefully constructed it was avoided. But the 2 line ghazal becomes ALL ABOUT those repeated words. They drum a bit too heavily in the head, like over exaggerated rhymes in a ballad.
Therefore; I was wrong, but I still think I was right.
What do you think Mike?