Some of the kanji numbers have changed with production of the last couple of lessons, mostly because I had a number of kanji marked as being dependent on ‘shelf’. These included ‘help’ (助), ‘investigate’ (査), ‘tatami mat’ (畳) and ‘best regards’ (宜). Although these kanji do contain a radical often known as ‘shelf’, the appearance of that radical is usually the same as ‘moreover’ (且), which is only reached as part of the second five-stroke core kanji lesson.
These kanji had been introduced prematurely because, confusingly, there is also kanji called ‘shelf’ (棚), which only needs ‘tree’ (木) and ‘moon’ (月).
Moving the kanji around has changed the numbers, which will mean that the current version of the Android app will have slightly different numbers to the online lessons for now. The numbers will be reconciled with the next release.