We... were trying to move our Nemo FP+ up as soon as possible instead of waiting an hour for it. It showed me it was giving me a time, but when I hit confirm instead of giving me the time it showed me, which was probably 15 minute away, it changed it to a time in the late afternoon... The Nemo wait was 30 minutes, and the whole point was to try to get the FP+ done quicker to hopefully grab a 4th from a Tier 1 like TT or Illuminations (silly me- at that point I didn't realize that was an exercise in futility anyway). I marched over to a kiosk... There were no Nemo FP+ earlier than one it glitched and gave us and she could not get ours back. So, considering we were going to be at WS at 4:00 p.m. and were not going to come back to FW for Nemo- we lost our Nemo FP. She told me the only FP+ they could give me that kicked in soon would be Captain EO, but that if I was trying for a Tier 1 as a 4th it wouldn't do me any good anyway, as there was no availability for any Tier 1 the rest of the day. Mind you- this was NOT a busy time of year. Since then, I have gone to kiosks to move FP+- I don't trust the app.