So the NCAA loves all the Blue Bloods except UK and is out to get them - is that right?
The specific difference between Rose and Alexander is that AFTER the NCAA alerted the schools they were looking at POSSIBLE eligibility issues with the player, Memphis/Cal elected to play Rose anyway, while KU/Self elected to sit Alexander.
Memphis own attorneys admitted during the NCAA investigation that they knew BEFORE the 07/08 began that Roses qualifying test was being looked at for being a valid test score. Cal played him the whole season and it bit Memphis in the ass.
The day that Self was told Alexander was being looked into because of an eligibility issue Alexander sat and did NOT play another game for KU.
Back to the OPs question, there is no NCAA investigation to continue for Alexander because his parents apparently won't cooperate with the NCAA for them to investigate anything else and now Alexander has declared the issue is basically moot.
Rose: smoking gun - ETS declared his test invalid, so NCAA ruled him Ineligible and Vacated wins AFTER warning Memphis/Cal before season his test could could make him Ineligible.
Alexander: no smoking gun because NCAA can NOT force the parents, Cliff, or the lending institution to talk to them for there to be an investigation to find the smoking gun you want so badly.
Good luck. I tried explaining this but no one seems to care.