You offered too soon if you want to increase frequency wait for your new snake to be established in your care (3 to 5 feeding every 7 days) than you can try to increase frequency however not all will want to eat twice a week.
The F/T might also have been an exception, I have had hatchlings getting switch and taking 1 F/T and than refusing every single one offered until much later. They don't all switch and when they do it's at their own pace for now your priority is to get the animal well established and feeding, switching and frequency increase are not.