Text boxes keep bouncing around in Pages

Hi all,

So I'm currently making notes for a topic which is equation heavy, meaning that there is a combination of bullet point notes and text boxes with equations in them. Whenever I require two text boxes on one page, the first text box will stay where I want it, which is usually in the middle of the page. However, when I insert the second text box somewhere further down in the page, the text box bounces up into wherever the first text box is (somewhere further up the page). I am unable to drag this second text box down to wherever I would require it to be without it bouncing back up again. Can someone please advise?

Thanks