Game reset without warning, /without/ having gotten stuck at 91%, and resulted in a new id as mentioned above.
The game is saved on my SD card, because I have a crappy not-very-smartphone with very little ingrained storage space. XD
Thank you for your help! I do really love this game, which is why it's a bummer that a game based on gardening grew bugs... which I'm sure my mother, a gardener, would have warned me about if I'd asked her...