It may be worth making a short video of the issues and sending it to Instruo, there email is in their T&Cs info@instruomodular.com
For me as a producer of beer we like to investigate any issues that get reported and react as best we can to resolve problems or indeed in some cases our due dilligence tells us we have done everything correct and the customer is doing something wrong, each case is tracked back to production records and staff consulted so that we can always improve and if needed adjust process to target consistency.
Thankfully problems are vanishingly rare but we still take the time to see if improvements can be made.
Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.