@kxn25
UPDATE: after more research, this is not a bug in node-red-contrib-counter, it is an issue with how javascript handles decimals. Ther is a great explaination at http://adripofjavascript.com/blog/drips/avoiding-problems-with-decimal-math-in-javascript.html
The solution for you is to use whole numbers and device by 1000 when you want to use it. Here is an updated flow as an example:
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