Quite often when working on boats I see odd fitting hoses. It does not take much to figure out why. Many male hose adapters are not built or designed for marine applications where we use two clamps for below waterline applications.
When the male adapter is too short tightening the second hose clamp can actually distort the hose, create potential for a rip or tear and it can actually work against the hose adapter trying to "pinch" the hose off the end.
If the first clamp were to fail, as they do, the second clamp could potentially have enough pressure on it to help the hose fall off the hose adapter.
This nylon hose adapter is far to short to accept two hose clamps. Always measure the exposed barb surface before installing two hose clamps.