So this is a weird one. My site has been indexed with bing for months now and still is. I think i have 37 pages indexed anyways i ranked high on all my targeted keywords until about 2 weeks ago i suddenly disappeared into thin air from the SERPS. So i was like ok it's just some juggling going on no need to worry. I checked to make sure my site wasn't blocked in the webmaster tools and it wasn't so then i check to see if my pages where still indexed and they were. But then i checked to see what would happen if i searched for my domain instead of a keyword. Well i was sure i would be number #1 or at least in the list. So i type in the search box wiredtogether[dot]ca and guess what.... i don't even rank for my domain name hahaha how's that possible? Curious if anyone else has had the same issue. Also i asked there support about it which was a waste of time.
Yes it happenned to me, try to check the pages, build some links for the pages which has gone inside, improve the page design , make it compatible with w3c. Check for any sitemap errors, robots.txt errors soon site will be back to normal.