Your weather station is working perfectly fine. Those little peaks and dips in your graph are real valid data. You have better data than those other stations with less frequent uploads. The other stations have smoother graphs because they upload less frequently and they may do data averaging before uploads. I don't think data averaging is better. You can't change your upload frequency. Your station is not uploading at 1 minute intervals. Your station is uploading at 16 second intervals. You benefit that your WU dashboard view is more live, like your console. The 1 minute setting you might have seen is not for WU but instead that is for uploading to ambientweather.net. You don't want smooth graphs. Your graphs are better.
See this comparison that I did of another way of uploading with different hardware attached to the WS-2902A:
https://www.wxforum.net/index.php?topic=34976.0
See this comparison that I did of another way of uploading with different hardware attached to the WS-2902A:
https://www.wxforum.net/index.php?topic=34976.0