Every increase in a skill increases the salary by a set % Depending on position of the player every skill has a different %. Some are free for some positions and some skills are very expensive. You can look at a salary calculator and try different builds and see what an increase in different skills cost. That way you can find that some builds are a lot cheaper then others. Try a C with 15 IS/ID/RB ans 8 SB for example and then switch IS and SB.
Either:1) At the time, the position he was at made it a free skill pop2) The 14 to 15 pop salary increase happened but you didn't see it until the start of the new season when salaries updated
