Pages overlapped

Hi there, I have a question need your kind answer.

1. when I checked the published files and found that the text in main page overlapped with the content in the sub-page.

Below picture will show you the normal display when open the page 4 in SMM for SMP 7.2, animation include the Mobile device sales are surging, click through these buttons to learn more fade in .

2. When click the blue button Desktops , below picure will show up. which is normal too.

3. But when click the Replay button ,  the text in the main page overlapped with the content in the Blue button page. So how did this happen? you know, it should not replay the text in the main page but replay the content in the bule button page.

Please help me.Thanks in advance.