cassandra possible IntegerType bug?

gistfile1.txt

in CLI:

create column family a 
with column_type = 'Standard' and 
   comparator = 'IntegerType' and
   default_validation_class = 'UTF8Type' and
   key_validation_class = 'IntegerType';

=======================

PHP:

$cf = new ColumnFamily($pool, 'a');

// problem?
$cf->insert(-32984, array(0, 'test'));
$cf->insert(0, array(-32984, 'test'));

$cf->insert(-329841, array(1, 'test'));
$cf->insert(1, array(-329841, 'test'));

=======================

back in CLI:

>>> list a;                                                                        
Using default limit of 100
-------------------
RowKey: 8388392 << WTF?!?!?
=> (column=0, value=0, timestamp=1340189779932723)
=> (column=1, value=test, timestamp=1340189779932723)
-------------------
RowKey: 1
=> (column=0, value=-329841, timestamp=1340189779937252)
=> (column=1, value=test, timestamp=1340189779937252)
-------------------
RowKey: 0
=> (column=0, value=-32984, timestamp=1340189779935107)
=> (column=1, value=test, timestamp=1340189779935107)
-------------------
RowKey: -329841
=> (column=0, value=1, timestamp=1340189779936292)
=> (column=1, value=test, timestamp=1340189779936292)

4 Rows Returned.
Elapsed time: 36 msec(s).