The noindex and nofollow options are available on the homepage when editing it. You can change it while editing the page.
It should only be generating a site map first upon activation of the plug-in then upon access of the website/admin. The later only happens if under settings generate site map checkbox is checked.
This may be changed in the future.
I updated this in 1.4.9, thanks for letting me know!
I am experiencing the same issue. Two weeks and no response, no resolution.
