Exporting graphics over interlaced futage

Question

I would realy aprishiate your help on this one!!
And sory for my poor english.
working on pc p5q deluxe core2quad 8gb ram vista 64
After effects cs4
Im working on 1920:1080 50i square pixels uper field first futage and I aplied some graphics in after effects. But when I render it in same interlace resolution and import (interpretate futage) the futage looks good but graphics like text and every other element drown in after effects looks in poor resolution. I have to deliver interlaced futage and i tryed everything I could think of with no resoults.
befour rendering I render preview and everything looks perfect, but when I render it(1920:1080, sqere picsel, uper field first, TIFF sequence, same as the footage) and import renderd sequence back on top of layers to compare, the footage looks perfect but graphics look 5% blured.
Is it posibile that only a part of the same, renderd footage is previewed incorectly ??
I always interpretate futage as it is captured or renderd.
Delivery metod is a little tricky too, I have to export to editors interlaced footage so they could put it in their project and further down the line they will send whole film to the laboratory so they can deinterlace everything together and transfer it to 35mm so even if it looks good on interlaced monitor will it look the same on the film??
plese help!!

Answer 1

Thank you so much four reply, I tried with OpenGL rendering on and off but the problem is still there
and I watched it on interlaced monitor, it looked little better but not perfect. But I realy think that the problem is in my work flow so I made this smaller and much simpler project where I get the same kind of defect and maybe you could tell me where I made mistake??
-open new project make new comp(dv pal sqere picsel) and make one text leyer(I wrote "test" with big futura bold font, white font against black bg).
then animate text, I applied expresion to rotation time*120. Add to render queue and go to render settings and set field render to upper field first
quality best resolution full ofcourse, and in otput module chouse TIff sequence and render it.
Then I imported renderd tiffs,interpreted them as upper field first and edges of the text look like they lost a half of resolution horisontaly.
..ok, if its my monitor than i shuld be able to deinterlace that and see a normal picture right??
Add that new comp to render queue and export with same settings just change upper fild to no field. and again i get the same problem vith edges.
obviesly i make some mistake in that proces but if that same proces works great with captured interlaced futage why do I get this problems with grphics made in after efeects and how do you combine those two(interlaced fotage and AE graphics) and export them as same interlaced footage??
Is that the right way of interlacing the graphics made in after efeects??
and Thank you once again, I will appreciate any thoughts and help on the subject.