Streaming segment (profile attribute + event attribute) qualification behaviour.

There is a streaming segment with condition - 

AttributesInclude First name equals latency

Events(Include audience who have at least 1 Any event where (Event Type equals latency.ingested) ) and occurs in last 10 minute(s)
 

Scenario 1 - 

event ingested first - no qualification

after 2 min profile ingested - imediate qualified to the segment.

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Scenario 2 - 

after 10 min from first event ingestion 

the Profile got exited from the same segment.

qa) IS THIS EXPECTED? I have not ingested any event or profile attribute during this 10min.

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Scenario 3 - 

after the profile got disqualified from the segment

Event ingested again without altering profile attributes - re qualified 

qb) IS THIS EXPECTED? Just event is ingested and the profile attributes from previous ingestion stays as it is.

Can some one give answers to qa and qb with supporting adobe documents.