Yeah, the game is piss poor...It has happened with me also...
Event 1 : Bought a player of I X value after buying him he became a player of X - Y value automatically...
Event 2 : A player had X wage after assigning skill points his wage became X + Y...
So I appeal again can any one from Nordeus explain us this series of weirdo thing...

...
To your answer it some times happens when you recruit a player for value very less than his original value, his value increases automatically in the same way if there is a player whose wage is very less compared to the others of that level, his wage increases automatically...
You see automatically, cosmetic are some of the words which are integral part of this game...