Are we talking about the same type of hose? These are the ones that expand when there is water pressure in the pipe and shrink down when the pressure is released. The art is to keep some of the pressure in the pipe so they work best when the flow is throttled back a bit, using the valve at the motorhome end. That way they remain expanded and have a good bore and flow rate. I have never had any problem with flow rates with these. And mine are just roughly rolled up and put in the same storage box together. I never have any problems separating them.I'm not a fan ... we had 2 which we recently took to the tip! They have a slow flow rate compared to a normal hose so filling can take a while and if you're on a 'timed' water tap you can end up with only half of what a normal hose would allow.
We found that the fittings can eventually leak and to be honest they don't save much space compared to a normal hose if it's wound up well - we have 2 normal hoses, the wound smaller one fits in the centre of the wound larger one and goes pretty flat so can be easily stored.
If you need to use 2 of them they can also try to 'mate' by curling round each other if you're not careful and are a b*gger to separate!