You only lose the FP if you accept the new time slot with another FP. But technically, you aren't losing anything, you are replacing it. When you tap into Space at 10:10, try to see if you can possibly move SDMT up to anything in that area. It won't give you a time for where you have BTMRR at 12:20, but it will show you any other earlier time that you don't already have occupied by a FP. You could also move BTMRR up immediately to an earlier FP time allowing more times for SDMT to show. I hope I've made sense. Let me know!