Thanks for your feedback. This is actually intentional. But you can always display the original search (on filter right below the search).

But splitting your return flight into an open-jaw ticket is part of our algorithm. In some cases this provides you with significantly cheaper results.

Like here:

https://tripdelta.com/results/SFO/YVR/11-09-15/YVR/SFO/13-09...

If you don't like the suggestions, you can hide them ;). Hope that helps?!