CoinMarketCap - incorrect data

Hello. Why is one of the largest info sites unable to update the right information?
- Circulating Supply
- Total Supply
- Market Cap
- Volume (24h)

... and other data.
* Price Excluded
** Volume Excluded
The price and volume are determined by the shifting exchanges. Very little exchange.

Dev is trying to contact the CMC for several weeks / months to fix their mistake on the site. Unsuccessfully.
What are your views and experiences?