Hey Javier,

The Offload Once every minutes. Decides how often these values are generated. It is meant to be able to collect the data without being tied to when the data is actually pushed to the central DataBase. As an example you set the general offload time to 5 minutes and the trend data offload to 7 minutes (starting at 12:00:00). then the following cycle will happen
12:05- Offload timer fires, no trend data has been generated so it is not uploaded
12:07-trend data has been generated but not uploaded
12:10-Data is uploaded (included the 12:07 trend data)
12:14-new set of trend data is generate but not uploaded.
12:15-Data is uploaded to the db
….

The second setting you highlighted relates to average trending. You can choose there which average trendpoints you want.
(short 5-minutes) are gnerated by the system every 5 minutes
(long 60-minutes) are generated once every hour.
Just like the previous example this is when the data is generated, not when it is uploaded. So to reuse the example, only offloading the long timeframes, with an offload rate of 5 minutes will create the following cycle
12:00:00-trend data is generated and uploaded
12:05:00-Data is pushed to the central DB but no new avg trending is present
12:10:00-Data is pushed to the central DB but no new avg trending is present
12:15:00-Data is pushed to the central DB but no new avg trending is present
….
13:00:00-trend data is generated and uploaded

I hope this clarifies the questions a bit