Note that there are no hard delivery order guarantees in the Streaming
API: ordering is best effort.

This issue is most apparent when using the count parameter for deep
lookback during Streaming API server restarts and also during the
apparent race condition between status creation and status deletion.
Yes, deletion notices may be delivered in advance of the status
itself. Even in this apparently odd situation, the delete statuses
still must be purged from your backing store.

-John Kalucki
Services, Twitter Inc.

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