The "highlighting" of departing players is a new feature introduced in 3.0 which I reported as a
bug during BETA but has not yet been fixed. The highlighting of players does *NOT* use the same method as the one used for allocating recruiting resources so you would not get those resources for any senior who returns for his 5th season (which would be an issue in Division 1 *IF* the player failed to get a minimum 2.8 GPA but I guess seble wants to treat that situation similar to a transfer so you would only get resources at the start of the 2nd period).
As for the OP, since he states he is a DII, he shouldn't be getting any resources for him as he will definitely return for his 5th season. You should be getting resources for only 3 openings and although you can get more than 3 players to consider you or to VH and offer them scholarships, only 3 will sign unless you cut someone when you are allowed to.