Download of deck messing up entire Anki

when I download a deck it keeps changing different decks that are unrelated to the subscribed deck and isn’t downloading as its own named deck but rather uploading into a deck ive created from the past further messing with my entire Anki

Can you describe a little more what’s going on? Screenshots would be helpful if you’re able. What deck are you importing? Did you already have notes in your collection that were a part of that deck?