Two different cars configurations? Standard and with trailer?

How can I set up a configuration that uses my experienced consumption when driving with my trailer?
I’ve tried, but the consumption the app uses are almost double of the actual one. Making the plan and app useless.

In the screenshot above I have entered the actual experienced consumption on this trip. (I drove it two days ago.)
Note that the app uses 595 Wh/km for the plan. I would like it to use the one I specify.
How can this be done?

The issue is the same in both web and android version.