Hi Ken,
I actually downloaded Arthemia myself (it’s a cool theme!) so I could check it out (and also so I could learn from how more experienced WP developers do their thing! ?? ) Here is what I discovered:
– If you leave the categories set to ‘all’ in my plugin, the category removals hardcoded in Arthemia’s index.php will take precedence, but if you select a category in my plugin, only posts from that category will be displayed.
– The number of posts shown on the frontpage is taken from my plugin, not from what is hardcoded in Arthemia’s index.php.
– Because Arthemia uses the_excerpt() instead of the_content() in its index.php, the post length limiting factors of my plugin aren’t very useful. It works as designed, but since the_excerpt() strips all HTML tags and limits what is displayed to 55 words anyway, it’s a bit pointless. If you wanted to use my plugin’s abilities instead of Arthemia’s auto-limiting, then you’d have to replace the_excerpt() with the_content() in index.php.
I hope that helps!