Textbox adheres to a different textbox's column setting

I've run into a minor issue that is pissing me off royally.

I'm currently setting up a document in InDesign, and I'm working with a general textbox on all pages, with smaller FYI-esque textboxes that are seperate from the underlying/first textbox. The underlying textbox is set up with two columns as the standard, the smaller boxes are not. Here is where it gets annoying:

I can see that the smaller textbox, seemingly views the underlying box's column-line, as part of its border. I currently have the small box in the lower-left corner of an A4 document, and it should go a little over the central part of the document, though when I move it closer, the text narrows, and when I increase the width (horizontal) length of the box, the text still will not cross the column of the underlying box.

Anyone got an idea what the problem is, and/or how to fix it?

- Mads