Thanks for reaching out to the Community. I'm sorry the screen seems to be bouncing for you when you are scheduling emails out. Have you tried a different browser to see if that stops the screen from doing that? Maybe even trying Private/ Incognito mode as well. I am unable to replicate this issue on my end but wonder if maybe its the device that you are using or the screen size of your device, bouncing to try and fit the screen. I would recommend some of these troubleshooting steps, but if you are still experiencing this and are able to get a video of whats happening, please email it to us at social_support(at)constantcontact(dot)com so we can investigate this issue further.
This may be a css issue on your side, unless you're sending multiple campaigns you would not notice it. As the success message appearts it pushes content down to make room for message then when it disappears everything moves back up. very annoying when trying to click buttons.
Thank you for replying with a video of what you are seeing on your campaigns page. I see that you are using Chrome; I am not able to replicate myself in Chrome. Have you tried another browser and get the same results? Are you on a wired or wireless connection? We just need more information in order to troublehoot correctly.
I look forward to your response.