Steven Zahm@ Molly
Is this in reference to the Slim Plus template your purchase a couple years ago? If it is, you can disable the pagination with the enable_pagination='false' shortcode option. If you are seeing 200 per page, then you are likely using the page_limit=200 shortcode option. If you are, remove it and disable the pagination.
Here is the doc page for Slim Plus which shows the available options with their default value.
Now… that said, I very highly recommend against displaying more than 50 or 100 per page which is why the template pagination defaults to 20. The page load time will suffer; ie. slow. This is not a bug or limitation with Connections, the same page load time issue would occur if you attempted to load 200 or more pages or posts on a single page. It is very resource intensive.
I hope this answers your question thoroughly. Let me know.