Array node inserting

I’m trying to use the array node to insert values in to an array, but it doesn’t seem to matter what array index template I use. It either doesn’t like a {{index}} value or any manual numeric entry.
It just gets inserted 0, 1 e.t.c depending on the order I do it.
I must be misunderstanding something here.

Maybe I should explain a bit better what I’m trying to do.

I have one payload array data.item.measurement1 that I would like to input data from another array called data.test.meassurement2
I would like to end up with the data.item array having both measurement1 and measurement2 in it using the same index number.

Hi Lars,

Could you provide some screenshots on this, such as your Array Node configuration and what the output is? I would first like to determine where this issue is occurring.