Hi
Could you give us a few more details about your topology.
The issue is obviously that redistributed routes in EIGRP have an AD of 170 whereas internal EIGRP is 90.
Now you can change these AD distances under your EIGRP config ie.
router eigrp 1
distance eigrp 90 85
where 90 = internal
and 85 = external
You would need to do this on all routers. However please don't go off and do this without us understanding your topology as changing AD distances like this can have adverse knock on effects.
Jon