You got a point, Erick.

I can't ask for your account details here to check your conversation with our Support. I would suggest getting in touch with them again, so they'll know that you're still having double slide bars.

In the meantime, you can hide the left Navigation bar to view the full width of the report. Or, you can export the report to Excel. These can be a workaround at the moment.

Feel free to send a reply if you have more questions.