Difficulty with Custom GPT and CSV Files

I have created a custom GPT and when I upload the CSV file, it seems that it only scans the top portion of the csv file for addition to my LLM, it doesn’t seem to ‘see’ the mid to later portions of the file, even after coaxing in my prompts.

I’m basically trying to match my C:C with my N:N to make links on the portion of the output, but it seems to only favor the top lines, and never finds anything further.