If I remove ice maker recipes via AMTweaker it still appears in NEI (although it doesn't work any more). It works for all other machines as far as I can see, the issue only applies to the ice maker.

and the tea maker...

Thanks you. I was not aware of these issues.
In the old version, AMT2 had handed a copy of the Tea Maker and Pan recipes to NEI.
In 2.6d these will be fixed. ^^