editor not working as should be due to conflicts

On my Spirit themplate I use the Upfront editor to make changes, but manytimes I see inconveniences.
Like the upfront panel at the left side, mine is half jumping in my screen, see screenshot
I noticed with a support sceencast that thats not the case, normally

I also notice different other issues, due to the fact that in an other support question, the technical help noticed something to be investigate by the advanced coders, I wonder if this will be needed for this issue too.

I just hope to have a drag and drop in upfront that is the same smoothness all the time, now I sometimes can not dag and drop.