Most boats will have a slight list which in some may not show until underway. This can be caused by numerous reasons a few of which are: weight distribution, batteries can add a lot of weight to one side, distribution of crew, when underway prop torque in single engined boats can be a big factor, wind and tides can cause listing. I have this problem on my boat which is weather dependant. Answer can be as simple as using trim tabs which is all I do with wind/tide induced listing.
Re Rodman's having double skin, mine doesn't not sure about other models though.
Good luck with sorting your issues, it will be worth it in the end