Problem with axes of plotyy in a loop

Hi :) I don't very like the plotyy function. It makes me crazy a lot ... My problem : I want to hold on different datas on 2 different axes on the same graph.

For exemple :

figure();

hH = []; hV = [];

for i = 1:3

    hold on
    y1 =rand(1,10);
    y2 =rand(1,10)*1000;
    t = 1:10;

    [ax,hH(i),hV(i)] = plotyy(t,y1,t,y2)
    hold off

end

    set(ax(1),'Ylim',[0 1],'Ytick',[0:0.025:1]);
    set(ax(2),'Ylim',[0 1000],'Ytick',[0:250:1000]);

If i don't set the two axes is ok ! but i want to arrange the Ytick and there are two problems : -1) Tick of the axe Y1 is on the Y2 axe -2) There are overlaps of numbers on the Y2 axe.

I know that there are a lot of same topics on the web but it's not working in my case in a loop

If you have any ideas :) Thanks a lot !