I recently got rid of SP Tim Keefe (579 RL inn) who was in a three man rotation with settings of 1, 2a and 2b and got two regular starting pitchers. But now the sim won't allow me to place the 2a and 2b guys in a regular slot in a four man rotation and wont allow me to place my two new pitchers in a regular slot. In other words, I want them in a normal 1 through 4 rotation, but the sim wont allow it. It's currently set up as 2a, 2b, 3a, and 3b which is killing my starters because the sim keeps pitching them with only one game rest (and quite fatigued) and skipping over fully rested starters. How do I get out of this 2a, 2b, 3a and 3b situation and get them in a regular 1, 2, 3, 4 man rotation?

you have to wait till 3a or 3b is starting. then take 2 guys and make them 1 and 2. then when 1 is starting you can make 3a and 3b into 3 and 4.