BIG problem with Zip Map node and Data Visualization tutorial

Hi, everyone!

The Zip Map Node returns the proper values, but not as a proper list. It places all the possible values in a single row, instead of using a row for each key value. Therefore I can't use the Look Up node to to return lists of values associated to each key value. I've tried a few things like turning the list data to a string, but the String and Make String Nodes didn't work.

AAaaah! What can I do??! Please help. :(

I attach my files. The last one is a clearer example which shows the problem without needing you remember the tutorial.

Okay, I found a discussion of someone with the same problem and lucasnijs gave the answer. The solution is to remove the decimal point from the year values using Integer nodes.

Here's the link to it:
https://forum.nodebox.net/t/11038205/what-s-wrong-with-zip-map

Thanks.