Thanks for raising this - The QA team has run some tests and is happy with the current rate of progression.
To give some context, there are lots of factors that will improve progression such as Training schedules, match time, happiness, dynamics, and the level of opposition. If you are continuing to see other examples of this ideally across a longer period than 2 years, as in the grand scheme this is a small window, please feel free to provide more information via this thread and we can investigate.