Thanks for reaching out. Unfortunately, removing reporting lines is not currently supported in Lucidchart. However, we're always looking for ways to improve Lucidchart, and your feedback is the best way for us to do that. Would you mind adding your idea to our feature request form? Ideas submitted to this form are passed on to the product development team for their consideration.
Additionally, it is not possible to add different tiers within the same level of an org chart. For a potential work-around, this layout style highlighted in blue may help you create the appropriate structure.
However, if this isn't a perfect solution, please feel free to add an additional request through the above form. Let us know if we can do anything else to help. Thanks!