"Casino", "Dice", and "Educational" subcategories of the "Games" category are not working correctly:
On the desktop U.S. Yosemite 10.10.3 using iTunes 12.1.2.27: They are not listed in the "Games" subcategories list.
On U.S. iOS 8.3: They appear in the featured list under the main "Games" subcategories list but they do not report proper content, instead they show the content from the main "Games" category.
Also glitching in the web (from the desktop Safari 8.0.6 Yosemite 10.10.3) at the iTunes web version, go to the links below and then follow the "View in iTunes" link on the page in the upper right to see some iTunes whackiness:
This has been glitched for a while now, maybe since the March app store outtage event. Really negatively effecting sales for apps in these categories. Let's hope 8.4 and El Capitan resolve this issue. hint.. hint..