Hello,
yes indeed, pdf certificate has some alignment issues. we are working on it. if it would be so easy we have already fixed that.
I know it is not perfect but we are trying hard to make it perfect. in coming updates, we will fix this. we are dependent on heavy libraries of jquery and other modules, packages, dependencies, etc.
I can do one thing: i will check the HTML certificate builder again. and try to build a new certificate. i will work on this on high priority. just bring me some time and little faith.