PlusEMU (Habboon) - Furniture bug

So, I'm using plusemu habboon edit and I have a weird bug with my furniture... When I place a item on top of another it disappears. I thought it was something with the stack_height or HeigtAdjustable but couldn't find a error there.. So I was looking around in the help thread and found nothing. Also, the magic stack tile isn't working 100%. I can only put in numbers like 1,2,3 but when I add .25 behind it, it dissapears just like the furniture bug I also have.

Example stack magic
(http://i.imgur.com/VvMHkCy.gif)
http://i.imgur.com/VvMHkCy.gif

Sorry, for my english I'm belgian.