I think the upload image issues can be corrected if you first fill in all the default items for the product under the General Info file tab
2... first chose the Maine Image, Hit the Green apply, then chose the other images next
3..... to delete the images , tick the box next to them then hit the green apply,
not sure if this is the difficulty some are having but I think this was my bit of frustration today , seems to work for now
Greg California USA