Positioning frames for title page

I ran into a problem when creating a title page using vertical frames, which I believe is the correct way to do this. I added a title frame, a composer name frame, and then a third text frame for information about the work. At first this was OK, but as I added more text I ran into problems as shown in the attached screen shot. It seems that one cannot offset the Y value by more than 99.99 space units; if I could move the text frame further down, that would solve the problem, since there is actually room on the page -- but I can't. (It does not matter whether "automatic positioning" is checked or not.) I am using version 3.04. I will be grateful for any suggestions!