"Anyone who's currently invested in Wal-Mart is well aware of the problems the company faces." Wal-Mart said April same-store sales fell 4.6 per cent at its Wal-Mart stores, while they rose 2.5 per cent at Sam's Club. Sales in the apparel and home categories at Wal-Mart stores were soft as cold weather hurt store traffic and sales of seasonal merchandise, it said. Its grocery business performed better than general merchandise.