Thank you Garald,
now I see more clear how the recognizing works:
MOVI only recognize learned words and until a factory reset all words learned in sketches are memorized.
I used the simple debug sketch as it is with “This is the first sentence”. and so on.
I think the numbers where in the memory from a sketch I used before, this was also not clear to me, my sketches now works more as expected.
I still have problems with the already discussed “aggressive matching” I try to solve this issue by consideration of the example sketches and recent forum topics on this problem.