Skyblock Slab - Island Level ?

Okay so quick question in regards to SkyBlock - Do Stone Slabs increase your island level? Because after spending about 4 hours making and placing stone slabs, my island level has not moved at all...



On the right hand side I started to make a solid block area to test my theory and my island had gone up by 2 levels alone. Is there any possible way I can get a high up rank to world edit out the slabs I placed and refund them for solid blocks? (Obviously 8 stacks of slabs would turn into 4 stacks of blocks though). Even if I just get it removed from the world so I can place back down solid blocks instead. Cheers!

As discussed in-game, yes slabs do impact your island level but they were severely nerfed last week. I'll look into changing this!