a question about wp dtree plugin

the plugin page is

https://www.silpstream.com/blog/wp-dtree/

i want to say that this plugin was the most powerfull plugin that i have never seen.

i have a question about something that i couldn’t do.when i click on a category i see the posts of that category but i couldn’t find a way to sort that posts.posts are sorted by the date and i want them to be sort by alphabetic letter.did any one use this plugin and could the the sorting like what i wanted.

but i saw that this plugin has a negative point that it has lots of query(=posts that blog has).did this affect the seo.it is also using javascript.i want to know does theese affect seo.i am waiting your answers.thank u ??