The Japanese Pokémon Global Link website announced that for 3 minutes between 14:43 and 14:46 on Wednesday February 12th, 2014, the Nintendo Network service had a system failure which caused Rating Battles to be logged improperly.

An investigation concluded that 55 matches and 110 players were affected during this time period. For those of affected, a personal apology addressing the issue will appear at the top of the page for those players when they login to the Pokémon Global Link website.

Pokémon Global Link Maintenance

It was also announced that the Pokémon Global Link will enter a maintenance period and will be unavailable for Pokémon X and Pokémon Y during the following times:

US: Monday, February 24, 2014, from 3:00 p.m. (EST) until Tuesday, February 25, 2014 at 7:00 a.m.
UK: Monday, February 24, 2014, from 8:00 p.m. (GMT) until Tuesday, February 25, 2014 at 12:00 p.m.

Sources: http://www.nintendo.com/consumer/network/en_na/network_status.jsp, http://3ds.pokemon-gl.com/information/98fd69cc-31ba-49a7-ac4f-e8de73c9a942/ and http://3ds.pokemon-gl.com/information/87e54e29-2572-4e9e-810f-b88c4c4e9ebd