Hopefully self explanatory in the pic:

https://i.imgur.com/Sgllyfp.jpg

The record should not be getting added to the patch since 0.0000 and the huge negative number effectively mean the same thing.

Further, as this is an interior cell, water height data is irrelevant and can be safely ignored all together. The CK won't even let you set it. So if water height is the only difference, drop the record during processing.

On exterior cells, water height still matters, but if the situation is like the pic, drop the record.