Please help me with the images upload on my main page!!

I used to upload 9 images for my main category and show them on my main page to see how they fit in the overall webpage. I was having no problem at all. Right now i need to upload the real category image and my EXPLORER just wont show the rivised one ( it doesn't show on the preview image in my admin>catelog>categories/products either). However, my FIREFOX works perfectly with my images.............I wonder what did i do wrong here. I have updated to EXPLORER 8 and that doesn't work either. I really need your help since most of people are using EXPLORE. Anythoughts? Thanks in advance!!!
Here is my website:
http://topallinc.com/store

I put those new-uploaded images in the first row, total of three. the rest of six are those old ones that i no problem. Again it shows perfectly in FIRFOX but no in EXPLORER (including the admin page)

Here is my website:
http://topallinc.com/store

OHH ONE MORE THING. i was wondering if i can put the category titles (GOLD, KNITS and WOVENS) below or above the image just like it shows in the Sub-categories.

Thanks again