Description of problem:
The query that was done in old version of bugzilla returns another list of bugs

Version-Release number of selected component (if applicable):


How reproducible:
Run the query, find another bugs that match the condition.



Steps to Reproduce:
1. Query: http://hurl.test.redhat.com/jJRBLS
Running with in the new format does not help:
https://bugzilla.redhat.com/buglist.cgi?keywords=Security%20SecurityTracking&keywords_type=nowords&list_id=14662&j6=OR&f13=CP&o2=regexp&j11=OR&o15=lessthan&f12=creation_ts&o12=greaterthan&f14=OP&o20=anywords&f21=CP&v2=rhel-.%3F\..%3F\.z[%3F%2B]&f10=OP&f19=OP&v15=2012-05-31&f22=CP&f1=OP&o7=notregexp&f20=component&f0=OP&f8=CP&j19=OR&f18=OP&f15=creation_ts&j14=OR&v7=rhel-.%3F\..%3F\.0.%3F&f9=CP&v20=kernel%20kernel-xen&f4=CP&query_format=advanced&j1=OR&f3=CP&f2=flagtypes.name&v12=2012-05-01&f11=OP&f5=OP&f17=CP&f6=OP&product=Red%20Hat%20Enterprise%20Linux%205&product=Red%20Hat%20Enterprise%20Linux%206&f7=flagtypes.name&f16=CP

2. These bugs match the condition as well (for instance):

https://bugzilla.redhat.com/show_bug.cgi?id=819614
https://bugzilla.redhat.com/show_bug.cgi?id=818505
https://bugzilla.redhat.com/show_bug.cgi?id=818504
https://bugzilla.redhat.com/show_bug.cgi?id=817691

Actual results:
Query returns some of the non-security kernel bugs that were logged for ZStream between 2012-05-01 and 2012-05-31.

Expected results:
Query should return all non-security kernel bugs that were logged for ZStream between 2012-05-01 and 2012-05-31.

Additional info:
n/a