Banshee Smart Playlist Sorting Rules Limited to Screen Size

Summary:
When editing a smart playlist in Banshee, it appears that the amount of sorting rules you have is limited by your screen size. For example, when editing a playlist, I could only add 17 rules (any additional ones were off-screen) and although I could add them, I can't see what exactly I'm adding.

To replicate:
1. Create any playlist
2. Add as many rules, until it reaches the end of the window
3. Try adding an additional rule: it adds (you can see it by the increase in song-count of the playlist), but you can't see what it is

What I'm trying to do:
I'm just wondering if I'm missing perhaps a scrollbar, or is this a bug? I do realize that most people won't have more than 15 rules, but I'm trying to sort by artists, so it might be helpful to allow us to add multiple entries to the single field.

What should happen:
Perhaps a scroll-bar or a new page in the the window should appear, which allows us to view all the rules and edit to our hearts content!

Thanks, and hopefully I get a response!