Chronograf Error(?): Getting only last value in query


I’m new to InfluxDB and I’m now learning how to use the chronograf to manipulate my database. I used the query language: select * from “mydb”…“h2o_feet” limit 10. I supposed that it should return to 10 points but actually I can only get the last point. I tried another database and it worked normally. Is there anything wrong with this one or should I do something more to set it up?

The same query used in terminal returned to 10 points:

I don’t really understand what’s going on. Any advice would be helpful to me. Thank you.