Objectives not completing properly

Two of three objectives did not complete properly for me. I was playing the Planechasing Fblthp event and had the objectives to defeat 5 opponents in PVE events and trigger 6 times extra swap. While I was playing, the system added one to cast 15 black or red cards. I completed the 5 opponents and black or red cards objectives at the same time, but when I went back to the home screen (by bringing up the menu and tapping Home) it showed 1 less for both objectives (4/5 for opponents and 14/15 for black or red cards). Is this a known issue and if so, how can it be corrected? Thank you.