A family of Microsoft word processing software products for creating web, email, and print documents.
Even though some or all of the anchors appear in the same place, the one you see at any time belongs to the one picture or caption that is currently selected. Once all the pictures and captions are located on the page where you want them, select one picture caption at a time and drag its anchor to the corresponding empty paragraph (assuming you have one paragraph per caption).
The quickest way to update all the sequence fields is to press Ctrl+P to open the Print page and then press Esc to return to the document. (This assumes that at File > Options > Display, you have checked "Update fields before printing".)