Supply units can swim!

On any deployment I make, my supply units ignore the high sea and swim for it. Of course being deployed 10,000 miles away or more makes this frustrating. I air lift my chaps there, they do what they do, then drive all those miles back to the country they were lifted from in the first place. Of course now my troops are having to wait ages for supplies, I'm now concerned they will be auto disband because they have no supplies. Yes before anyone asks I have plenty in stock.

Any help would be nice! Thanks!

Usually this works its way out in one way or another. However, your scenario is too generic to offer a solution. I don't know what your deployment is trying to accomplish so I can't recommend a course of action that both achieves your goal and remedies your supply situation.