Air by date scraping issue

I'm having issues in Frodo with air-by-date shows. I'll use the Daily Show as an example. Sickbeard downloads the Daily Show for me, and it's set to air by date. The show does have seasons and episode numbers, but it's uploaded with the date in the filename instead of the episode number, so it's an air-by-date show. SB saves the show with its date in the file name. It also creates a corresponding NFO file, which contains both the air date and the season and episode number.

XBMC then picks up the file. On Eden, it would be placed in the correct season. Eden also realised somehow that it was an air-by-date show, and would actually display the airdate instead of the episode number within the season.

Frodo works differently. It seems to pick up some information about the file, but it doesn't end up in the right season folder. New episodes either end up in "Season -1" or in no season folder at all -- they're only accessible through "all episodes". If I trigger a manual refresh from within XBMC, and ask it to rescrape the episode from the Internet, all information is picked up correctly and the file ends up in the correct place. The question is: why is XBMC not picking up the correct information the first time? If the NFO file is present, will XBMC use it, or attempt to scrape anyway?