Poi Poi,ichigotchi can evolve from marutchi.But that ONLY happens in the 1st generation.
However, kinakomotchi evolves to Young mimitchi in the even generations, and ichigotchi in the odd.
So what happened to you is TOTALLY normal.For more info, you can visit rivenn's website and take a look at his growth chart.You can understand better that way.There is NOTHING against kinakomotchi evolving to ichigotchi.
"Ichigotchi will only evolve from Marautchi during the first generation"
This means that during the first generation,your marutchi can evolve to ichigotchi if you care for it.
But in the subsequent generations, like gen 3,if you get a marutchi,you will NEVER EVER get an ichigotchi.
Hope you are clear now.