Dear @=D,
Thank you for posting your question in the Microsoft Q&A forum.
I completely understand your confusion. Please know you’re not alone in this, and I’ll help you through every step to get you back in control as quickly as possible.
Even though the values in your seconds column look numeric, Excel is not treating them as numeric chart data. Instead, Excel is interpreting those values as text, which causes three symptoms you’re seeing.
Therefore, firstly, I recommend you highlighting the cells > choose format cells > choose "Number"
If the issue still persists, I recommend you try these steps below for better troubleshooting the issue:
Step 1: Test this in a brand‑new workbook
Open Excel and create a new blank workbook > copy and paste the column you need > insert the chart again
Step 2: Manually setup line chart
Go to Insert tab > in the Chart area > choose "Insert line" option > choose line chart
The char area will show > right click and choose "select data" option
Choose your chart data range > you can edit the "legend entries" and the "horizontal axis labels"
For example, here is my legend entries data > edit series
If the issue still persists, to help me narrow this down further, could you please clarify what type of equations you’re using in the seconds column?
Note: Please understand that as a forum moderator, my role is to provide general guidance and troubleshooting support. I don’t have access to internal systems or backend tools, and I appreciate your understanding of these limits.
I hope the information shared helps point you in the right direction. Please try the steps above and let me know if they work. If not, we can continue working together to narrow this down.
The first response may not always resolve the issue right away, but with your help and more details, we can work toward a solution.
Thank you for your patience and understanding. I'm looking forward for your reply.
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