By reading through your blog I found out, that the order is editable by using the order attribute in the shortcode.
Since the order of the widget on the frontpage is editable too, this “issue” is solved.

But if it is not a lot of work, you could consider to set the default order of the widget and the archive to the same value for user experience reasons.

That the one image is much bigger than the others is not much of a problem for me at the moment, but probably you could take a look at it. Deleting and recreating the service and the image did not change anything, even when using a different name for the image.