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Hi Jean,
Glad to hear you can figure it out.
I haven't got the information that the workflow has issue on a customized list. However, if you make use the issue indeed only happens on this customized list, and prefer to run a customized workflow on a customized list, you can post to our SharePoint 2013-using SharePoint designer , InfoPath forum to get further help.
For the new issue "I tried to create an Item using another user but the workflow did not start and it approved the item without any approval cycle", please post a new thread with a screenshot of your workflow, so we can focus on your specific situation. Meanwhile, you can assign this new user with different permission (full control/Edit/read…) to check if the permission is related.
Your understanding is highly appreciated.
Sky