Fix: correct minor bugs in the import/export workflow

[Rom1-B]

Checklist before requesting a review

Please delete options that are not relevant.

• I have performed a self-review of my code.
• I have added tests (when available) that prove my fix is effective or that my feature works.
• I have updated the CHANGELOG with a short functional description of the fix or new feature.
• This change requires a documentation update.

Description

• fixes #N/A
• Corrects several minor inconsistencies in the import and export workflow.
• Improves the reliability of checks and data handling used when running and configuring injection models.

Screenshots (if appropriate):