My colleague Down Under, Lee Hopkins, has not been as pleased with Windows Live Writer as I have been. Strange, really, because I've not had quite the same issues as he has with graphics. For instance, the one to the right is in at the original size, i.e. "as is" and looks to me quite like the original. Now I did not do anything to it like give it a drop shadow or a box around it, which would have resized the graphic and changed it a bit.
Lee, I'll suggest that you click on the graphic and then on the Image tab under "Borders" set it to "None". That combined with ensuring that the image size is set to "Original" on the Advanced tab should give you "as is" size you are seeking. At least, it does for me.
As to posting in the future, I'll try that out with this post. I would wonder if it is a function of the blogging platform you are using. Lee is hosting his own Wordpress - I am using hosted TypePad. We'll see. I'll set this with a date and time of today at 6:46pm, about 1.5 hours from now. Let's see if it uses TypePad's queueing to hold the post or if it posts immediately. (Hmmm... I wonder what Timezone TypePad operates on.)
Here goes the experiment...
UPDATE: Nope, it didn't work. Lee's right in that forward-dating a blog post does not appear to work in the current Windows Live Writer Build.
I'll note that I, too, used to have this capability in Semagic, but Semagic queued it locally and then posted it to the blogging service (assuming Semagic was running at the time the item was to be posted - otherwise it posted it when it was next started).