Good morning, @JenniH.
I'm glad you reached out on this. it sounds as though you may have conflicting time zone settings between your company's settings and your personal settings. Individual settings will trump the company settings causing the changes made on your timesheets. Here's how to check if these are matching up:
First, you'll want to check that you have the appropriate time zone set up for your company.
- From the Admin account, go to Company Settings.
- Click Time Options.
- Select the correct time zone from the dropdown.
- Select Save to ensure your selected changes are saved.

Then, you'll want to check to make sure your individual settings match these selections. Here's what you'll check next:
- Go to My Team on the left menu from your Admin account.
- Click your name you are editing, or, select the triple helix to the right (three stacked dots), and then Edit.
- In the General section, select the corresponding timezone to match your company settings.
- Select Save.

I'd love to know if this fixes the issue you're seeing. If the problem persists, please let me know, and we can look at other possibilities. Have a fantastic start to your week!