Double presses I believe are usually when the software delay for switch debouncing is too short. Unfortunately I am not familiar with that specific keyboard. If it runs software that allows you to change the debounce delay, I would try that first. If that isn’t possible, it may be only an issue with a few keys. See if it seems to happen to specific keys, try replacing the switches in those keys (or swap the switches around if you don’t yet have replacements). Sorry I can’t be more helpful, maybe someone more qualified will comment. Since it looks like a brand name keyboard, it might be best to just contact the seller or manufacturer.