The short seller who sparked allegations that Lumber Liquidators Holdings Inc. sold Chinese-made flooring with toxic levels of formaldehyde is now accusing Lowe’s Cos. of similar misdeeds. “New evidence has come to my attention that Lumber Liquidators may not have been the lone violator when it comes to laminate floor sourcing,” Xuhua Zhou said in a report posted on the Seeking Alpha website on Friday. Zhou — who is shorting Lowe’s stock, meaning he’s betting it will decline — first raised doubts about Lumber Liquidators in 2013.