Hey thanks for the reply!
Both are up to date, using version 3.4.2 for wordpress and 0.8.7.1 for sendpress.
We’re using the sites to send the emails. Like you said its as if a completed send isnt registering with the queue, so it just attempts a send again until it hits max attempts. I have tried sending to militply parties on different email platforms and all them reported receiving 3 consecutive emails.