Themes for OS 4.6 and 4.7 seem to be able to display more than two entries. The ones for 4.5 and lower seem to be only able to display 2 entries. The Bold has several themes that display more than two entries.
You need to download the version that matches the OS version you use (4.5) and the model number. The Storm themes will not work on your device. See the link below for more info.
4.5 themes, if made so, can support 10 calendar items I believe. More than 2 for sure. I have a today plus theme that runs 5 calendar items. They are out there, you just need to search for one, and be sure it is for at least your OS. If you are on 4.5, you can run a 4.3 theme, but not the other way around.