But my salary floor changed last week. It went from 131k to 144k. According to the game manual  salary floor is 140% of the TV contract for leagues II. 
So my TV contract should be 144:x=140:100. x=14400:140=102.8k
Is the salary floor going to change again at the monday update, together with the new tv contract? Or the tv contract is going to be 102k?
The salary floor is updated when the league salaries are updated on the Monday of the season rollover, so that won't change. The new TV contract is calculated at the same time, but there's no actual listing of the TV contract amount for future weeks anywhere, just what you've received in the past for TV contract - and the last one you received was the final one for last season. Next week, the economy update will see you receive the proper 102.8k contract in your situation.