Own the lot: large barge

I was doing the own the lot: large barge challenge on the Isle of grom, ended up do 3 out of 5 of the tasks and tried again. Well I ended up signing out halfway through the challenge and came back hours later saying the challenge is 5 of 5 complete. But in my own the lot challenges it's still saying I didn't do those last 2 and I also did get the skate pass tixs for it either so I did it again hoping if I actually complete it it will fix itself but it didn't. So I'm trying to get some kinda help here.