Few days ago we were facing with bing webmaster tools. But Inspired by couple of threads on this site, we tried to test few sites with bing, we started with bing webmaster tools and were surprised to find they treat our main site as a subdomain and vice-versa
If we have our subdomain as #*$! . example . TLD were root domain is example . TLD
Crawl Issues, Backlinks, keywords, etc. appear to be same for both the main domain and sub-domain.. This happened only for 2 of our sites, one of them being 2.5 years old.