The cydia home screen hasn't been displaying the shsh's you have on file for a couple weeks now, it seems to have gone crazy in the period of increased traffic following the limera1n and greenpois0n jailbreaks. Your blobs that have been saved by cydia are 99.99% likely to still be there, its just not displayed when you open cydia.
Always back up locally as well to be safe. shsh blobs are about 66 kb and there's no reason to not have them saved somewhere.