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Could you tell if it was coming from out of the seal area on the shaft or higher up where the lines attach? It sounds like you broke a fitting or ruptured a hose and are losing fluid. And yes.......losing that much fluid will cause an issue on the other jacks as a rule. Get back to me with this information and I can direct you further.
You may have to crawl under there with a flashlight to inspect the two hoses and where they attach to the jack. Usually, a seal only seeps and won't lose that much fluid. Let me know what you find.
How low is the reservoir for the fluid? You might want to fill it up and cycle the jacks and see if you can do that and have someone watch for where it is leaking. That might give you a clue of where to go next.
That must be some leak! It takes about 2 quarts for more fluid to fill that up. Use Dex-Merc or Dextron III.