See link from Ms. Sun blog below – it looks like UCSC may have over admitted by up to 1000 students and admissions is using transcripts that are late or slightly off to correct for this mistake. There is a petition for students in this situation and according to Ms Sun UCSC is violating policy.
The UC system has been turning away so many qualified students this year – a bit of a mess. Feel for all who are being rescinded. http://■■■■■■■■■■■■/home/online-petition-for-ucsc-to-reinstate-canceled-admission-due-to-transcript-deadline-issues-2015/