Carbon dating is hard....
Ironically these points by google gemini might apply to the dating you are referring..
Yes, carbon dating can be difficult for a number of reasons, including:
- Contamination: Carbon dating can be affected by contamination from other carbon-containing materials, like soil or glue. Even a small amount of contamination can significantly skew the results.
- Age: Samples older than 40,000 years are difficult to date because of the small amount of carbon-14 present. Samples older than 60,000 years can't be dated at all.
- Calibration: The amount of radiocarbon in the atmosphere has been affected by human activity, such as the Industrial Age and nuclear testing. Scientists use statistical methods and databases to account for these effects.
- Amount of organic material: Low amounts of organic material can make carbon dating difficult.
- Diet: The diet of the deceased can affect the results.
- Linking to environmental changes: Radiocarbon ages from bulk sediments can be difficult to link to past environmental changes because they are an average of many carbon sources.
- Cost: Carbon dating can be expensive