Good question, I’ll see if I can help. I bet there are a couple of ways we could solve this.

I’ll start with a few questions.

Does the user arrive at step 2 via Form submission or via clicked link?

And for Step 2 to Step 3? Does the transition occur from form submission or from link click?

Are you able to edit the PHP code of your variations?

Is it possible you could link me to Step 1 privately?

Since Step 2 is approached via link in step 1, you could add a special parameter to your Step 1 link like this:

https://mydomain.com/go/step2/?origin=0, where 0 is the variation ID of Step 1.

Then inside your Step 2 variation’s custom JS you could place this JavaScript code:

var salt = "e05c2685ee21b8ecdb8307d229e00b0e"; /* replace with salt */
var pageid = 1234; /* replace with step 1 page id */

var urlstring = window.location.href; /* do nothing */
var url = new URL(urlstring); /* do nothing */
var vid= url.searchParams.get("origin"); /* do nothing */

var callbackurl = window.location.protocol + "//" + window.location.host + "?postback=true&event=lp_conversion&id=" + pageid + "&vid="+vid+"&salt=" + salt;

jQuery.ajax({
   'url' : callbackurl,
   'success' :  function(result) {
       console.log(result)
    }
});

You’ll need to replace pageid and salt variables with the page id of step one landing page and the salt it provides in the callback url area:

If all works well the correct variation for Step 1’s landing page will show an increased conversion count.

If no ?origin=vid is present then it won’t increment any conversion counts.

There is a measure of hard coding, but it should not be hard to implement, and you will not have to edit template code, only add JS code into the metabox area named ‘Custom JS’ that’s available when editing any landing page variation.

In Step 1, for each variation, make sure that each link leading to Step 2 contains the ?origin=vid (replace vid with the variation ID of the Step 1 page).

So variation A of Step 1 will have a link like this leading to step 2:
https://mysite.com/go/step-2/?origin=0

In variation B of Step 1 we will have a link leading to step 2 that looks like this:
https://mysite.com/go/step-2/?origin=2

Then on Step 2, in all your variations, paste the JS code above into the Custom JS metabox.

Now whenever a Step 2 page is loaded it will read the ‘origin’ value from the URL and send the conversion callback, incrementing the correct variation for Step 1.

Does that make sense?

Yes everything looks correct. I tested the Step 1 to Step 2 transition and the callback fired once and reported a success message. There should only be one increment.

Will you clear stats and try again, just to make sure?