I'm having problems too.
Trying to book a reservation, and can get all the way through it.
It comes back saying my reservation is confirmed, but the is a box with MS info covering up the area that should show the conf#.
I go to travel plans, and it's not there.
I try again, but I borrowed points, and now those borrowed points are tied up in my non-existent reservation. A few minutes later, they are back, and I try again, and get the same result.
It's as if I'm hitting cancel, but I'm not.
Not looking forward to a long wait on the phones for MS!