Hi Christine,
Thanks so much for reaching out with your question about BoldGrid Post and Page Builder for WordPress!
I’m sorry to hear you’re having trouble positioning your blocks inside the page editor. I’m thinking your issue may have to do with your web browser. It’s possible that some sort of scroll lock option may have been selected causing it to behave this way. Could you try opening your page in a new incognito browser? Hopefully the solution is as simple as resetting to your default browser options.
You’ll also want to make sure that your WordPress theme, Post and Page Builder plugin, and WordPress core application are all up to date as well.
I hope this helps. Please don’t hesitate to reach back out if you have any other questions for us.