1. If 3 or more answers of user having < 10 rep is deleted, the question gets auto-protected. This is because majority of the time, the "answers" are me-too posts rather than just answers and [was implemented](http://meta.stackoverflow.com/q/91728/133693) as part of a feature request. 

2. Is a bug, being tracked at Meta.SO: [“Migrated from” banner looks wrong](http://meta.stackoverflow.com/questions/107374/migrated-from-banner-looks-wrong)