I've got a route I started to create and saved. I have then tried to edit it but if I click on the route it opens a box saying 'Add via point' and if I select this it says "Cycle Travel says Sorry we can't plan routes across the sea. Please plan journeys to/from your ferry ports." and then deletes the whole route. The route is between Bristol and Birmingham and I'm trying to add a waypoint 5 miles north of Bristol nowhere near the sea.
I can get it back by going into 'My journeys' and reopening it but I can't edit it. The route is called 'North Aug 21' and was created on 1st August @ 21.35 
Comments
For some reason it thought one of your via points was over the other side of the world! Not entirely sure why but I’ve fixed that route for now and will look into what might have happened.
Just got back from a week's touring. Many thanks for looking into this.
No problem! Anywhere nice?
I did a week's b+b tour of: Birmingham, Stoke, Sheffield, Derby and Stratford upon Avon.
I came back for the day, changed bikes and have just got back from a week camping and bothies in mid-Wales.