Hi @andrepola - Welcome to the Atlassian Community!
Default Issue Types are identified in the Issue Type Scheme. And then the Scheme is attached to a Project, not a Board. So, you are not able to set the Default based on the Board - only for the Project.
Jira picks up the last 'issue type' set. If you want to change this then create a record and change the issue type to the one you want. Try then creating another record and you will see it will pick up the last issue type used. What some people do is change covert the issue type through 'move' which does not change the default. Hope this helps.
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