Yes, they were the proxy IPs and Cloudflare won’t import the server IP if you move accounts, if the domain was proxied there. If they did, that would be a security issue since people could then find the IP of a site using Cloudflare by simply adding it to an account, even if they didn’t own it.
You will need to edit your DNS records in Cloudflare to change that Cloudflare IP to the one of the webserver.
You can certainly contact Cloudflare, but response times are high and it’s very unlikely they could give you any info on the domain in the old account, since you don’t own it.
If you do want to contact Cloudflare Customer Support, login & go to https://dash.cloudflare.com/?account=support and select get more help. If you receive an automatic response that does not help you, please reply and indicate you need more help.