Trouble editing text

I have the Professonal package with all modules unlocked. I’m trying to edit text on a pdf, but am running into some issues.

First, when I select text from a particular line in the document, a cursor appears in the right place, but the text box (presumably indicating the “active” text) appears around the line above it. I am not able to delete or change the text where my cursor is.

I created a new text box as a test, and now I’m trying to move or change that text, but am unable to do so. The cursor appears there, but I can’t delete letters or drag the text with the mouse.

What’s going on here?