Waterfall view not showing up data for click or scroll events

[anilpothala]

And also i would like to do scroll down on page1 before clicking on page2. i have added below script and some how scroll feature is working for page2 instead of page1. can you please help out here.

combineSteps
navigate http://www.walmart.com/search/?query=tod...s&cat_id=0
exec window.setInterval('window.scrollBy(0,600)', 1000)
execAndWait document.querySelector('ul.paginator-list>li:nth-child(2)>button').click()