low response discussion appearing on top of my lot page

When you start a new discussion it is on the top of the "Today's discussion page" and then some other new discussion starts then your discussion is slipeed to second position, It has nothing to with the responses or topic but it has to do with the acitivity on discussion, when somebosy again makes comment or response to your discussion it would be again on top. So activity on discussion puts it on the top of the page not no. of responses and topic of discussion. The discussion with latest activity on it would be on top and the discussion that has no activity on it from some time would continue slip downwards but again if somebody makes a comment or resoponse to that slipping discussion it would again at top.

i think thats not bad idea - that will give those discussion some attention and not only for those whos getting much responce

I think it is topic of discussion which makes it top discussion rather than number of its responses.