Why does existing text box text disappear when I paste in more text or link another text box

[AntiqueFlaneur]

Currently, page nine has an overflowing text box. I would like it to be linked to page ten and have the text pushed to the top of that page, where there appears to be space. When I do this, though, the text (but not the images) of the subsequent pages seems to disappear. If I instead copy the overflowing text and paste it into onto page 10, the same thing happens. Can anyone explain what's happening here? File attached. 

Thanks!

DisappearingTextLink.afpub

[h_d]

EDITED 

You're going to need to remove the linked text on pages 10-11 before you can flow on from page 9.

Steps:

Select text on pages 10-11.

Cmd-x (Mac) to cut it.

Link the text frame on page 9 to the text frame on page 10. This will flow the text from page 9 to page 10.

Click at the end of the text on page 10.

Paste the cut text back in, after the flowed text from page 9.

 

(Gratuitous bit of proofreading: it's "Breathe in", not "breath in".)