Create person first, then request campaign API call

We’ve noticed that some leads are not making their way into Marketo and Marketo customer support has responded with the following:

I meant to wait for few minutes after you make create person API call , so that new person created activity will be logged in marketo and then you should make the Request campaign API call.

Can anyone confirm if this plugin is first executing the create person API call and then requesting the campaign API call? This seems odd that this wouldn’t be the case, but not sure why else it wouldn’t be functioning correctly.