You had this same scenario exactly one year ago today. Here's your answer to your own question: "So much for an EF. Now I wish I had that $700 back I used to pay off my CC. I was stupid and paid off my CC instead of putting that into an EF."
https://www.disboards.com/threads/debt-dumpers-2024.3936118/post-65764009
The real question is, "What was the source of the $1000?" You were somehow able to save $1000 in less than a month, but it would take a year to save the same amount of money again? Something isn't adding up here. It doesn't sound like you were able to increase income or decrease expenses to gain ongoing monthly margin, which is the real issue.
My concern is that some or all of the $1000 is simply a one-time windfall or paycheck that just came in, which hasn't been properly budgeted for the rest of the month's expenses yet.