oops... used 3 qt jugs instead of gal jugs????

I am attempting my first Apfelwein... Thought the local BJ's(costco type store) was cheap... Wondered why I had so much room in the Carboy... After I added the yeast, I look at the bottles, they are 3 qt bottles.... I had a gal on hand and bought four 3qt bottles at a great price, thinking they where gal bottles... Uh.. lets see either my 4 gal of high octane Apfelwein (I added 2# dextrose) or could I add another gal tomorrow? I am not sure of what I should do?
I don't see any problems with adding more juice, do you?

Add enough tomorrow to get you up to 5 gallons and all will be well.

No problem at all.

I too noticed some AJ now comes in 3 qts...

Next comes the part where consumers will start noticing the price has dropped by 10% thinking thery're getting a good deal, but the contents dropped by 25%...