Wochit News - The 49ers recently opened training camp and already there are plenty of head-scratching questions.Such as:Why is the sod still pulling up in chunks at Levi's Stadium?The issue was supposed to be solved in the offseason, but after the first practices at Levi's, it was clear that wasn't the case. The 49ers were scheduled to hold their first eight practices inside Levi's, but by Monday, they were back on their training field and groundskeepers were pushing down divots inside the stadium.