adding section on editor presenation

in RTC 4.0.2 sections slots were left or right, and you can add as many sections. but in 4.0.3 what i observed that now the slots are detail, quick information,description and discussion. each slot represent a quadrant like detail slots represent top left whereas discussion represents bottom right. the problem is that now i am not able to add more than four sections onto the form. if i add one presentation with description slot setting and two with discussion, both presentations defined in discussion slot disappears. and when i relocate one presetation from discussion slot to quick information, they appears.. its bit weird.