Strange Start Connect Prior

Me, again

- fighting another issue with the Start Connect Prior Logic!

Script:

SELECT CONNECT_BY_ROOT(IXKIT) OSZ56ITMP,

  CONNECT_BY_ROOT(IXKITL) OSZ56LITM,

  LEVEL OSLEV,

  A.IXKIT,

  A.IXITM

FROM TESTDTA.F3002 A

WHERE A.IXTBM                     ='M'

AND IXEFFF                        <114037

AND IXEFFT                        >114037

  START WITH A.IXKIT              = 263273

AND IXMMCU                        ='     2740001'

  CONNECT BY NOCYCLE PRIOR A.IXITM=A.IXKIT

AND PRIOR A.IXCMCU                =A.IXMMCU

Now, look at the highlighted values.  I understood that the results should be passing the IXITM Value into the IXKIT Value, when the Level is Incremented.  There are a couple occasions where the IXITM number that 'should' be passed to the next row - is completely odd.  Look at the highlighted rows.  Am I missing something - or did I crash into a bug?