strange IMDB query results in RE

[VladimirPrevin]

any ideas? 

for IMDB in RE 

select alert.name, alert.source, alert.signature_id 

where alert.name exists && alert.source exists && alert.signature_id exists && alert.source='Event Stream Analysis' && alert.signature_id!='592d254bf280453f1bb37b3a'

times out and crashes RE.

alert.name exists && alert.source exists && alert.signature_id exists && alert.source='Event Stream Analysis' && alert.name contains 'Tier 1' 

returns alert with tier 5 

alert.name exists && alert.source exists && alert.signature_id exists && alert.source='Event Stream Analysis' && alert.name regex '%Tier 1%' 

returns alert with tier 5 

[EricPartington]

Can you provide a simple select on the data and include column headers so we can take a look at the logic?  Obfuscate the data that's not important for this query if you have to.