Can not add more than 4 Frontpage Widgets

I have created my first website using Otimizer theme. It perfectly matches all my needs and I was about to upgrade to the pro version before this bug hit me.

I have 4 Frontpage Widgets(1.About, 2.Advanced Text, 3.Blocks, 4.Advanced Text) and I am trying to add more widgets(Advanced Text & Meta Slider) but they just add up on the editing menu yet nothing appears on the page, neither in the customization page nor on the actual website.

Any help would be appreciated.