Hi,
If I remember well that committed fixed an issue when a new minimum was found while running Minos.
Suppose You run first Migrad and you get a certain minimum (x0, yval) where x0 is the minimum location and y0 the function value.
This can be a local minimum and it is possible that when scanning during the run of Minos you find a value y small than y0. In this case the solution needs to be updated and Migrad run again.
This is what is happening after this fix, so it is possible that you get new minimum values afterwards. However these values should have function values smaller than before. If this is not the case, then something else is playing a role, please let me know in this case
Best
Lorenzo