Status: Described behaviour is intended, due to the different values of talisman being weighted differently.
Just noticed that I have one talisman out of four in the Introduction level pack, but a talisman record of 26%.
There is a different weighting depending on whether they're bronze, silver or gold. In the case of the NeoLemmix Introduction Pack, indeed, if you only have the Objects 16 talisman (the only Silver one), it will show 26%.
For the record; bronze talismans have a weighting of 3, silver of 4, and gold of 5.