Cursor does not accurately represent position

Hey all,

I know this is a small problem, but it’s really frustrating. When writing and editing posts, the cursor slips by a few characters – so for example I’ll try to delete a comma that’s in the wrong place, only to have a letter a few characters up disappear when I hit the delete key – despite the fact that cursor still looks like it’s positioned on that comma.

It’s really annoying – has anyone encountered anything like this? I’m using Revolution Magazine at https://www.thedoubleagent.com. Any help would be really appreciated.

Thanks.