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BQ40Z60: Balancing not working cell 4 going over voltage

Part Number: BQ40Z60

When trying to preform a learning cycle, once I get to the part where I am supposed to fully charge the pack, I Cell 4 voltage climes up over 4200mv while the other 3 cells are still at ~4050mv +-30mv.

If I continue to charge the over voltage protector IC (BQ294700) will drive the FUSE pin before the BQ40z60 does anything.

1.) Shouldn't the BQ40z60 stop charging when any cell is higher than the COV Threshold (4300mv) before the protector IC blows the fuse (4350mv)?

2.) Shouldn't the BQ40z60 balance by bypassing cell 4 and not allow it to reach 4200mv?