I'm not sure if my reply will be seen in the previous thread that was moved in resolved so here it is 
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in taiko online scoreboard , accuracy calculation is incorrect as soon as the score is not an fc (the more misses the bigger the difference between in game accuracy, and online scoreboard accuracy) , I assume misses were forgotten in the accuracy calculation.
exemple from http://osu.ppy.sh/p/beatmap?b=12450&m=1
.in taiko online scoreboard , accuracy calculation is incorrect as soon as the score is not an fc (the more misses the bigger the difference between in game accuracy, and online scoreboard accuracy) , I assume misses were forgotten in the accuracy calculation.
exemple from http://osu.ppy.sh/p/beatmap?b=12450&m=1