Apparently when using jacob1's mod after placing signs the first time, any edits you try to make to it will not apply,e.g you put a sign but it has typo and wrong pointer but when you try to change text or pointer it does nothing after you press ok and you have to delete the sign and start over.
There's also a bug with the feature where a picture of whatever online save you hover over usually appears but it also flickers randomly when moving your cursor over the save.