Zora Lancaster is a Time Lady, and the sarcophagus is her TARDIS.Makes perfect sense.
Sonny Munroe is actually Sheryl Nome after The Wings Of Goodbye.After she recovered, she decided to run away without anyone knowing. She ends up talking a VF, fold into hyperspace towards earth, and landed in Wisconsin. but before she ran away, she dyed her hair dark brunette, got breast reduction, and changed her name. A childless couple took her in, and thought that her life outside showbiz is better. And then she became a fan of So Random! and went back to her old showbiz based ways... minus the "I appeal to the boys'' routine and being selfish. (This is because she was taught Wisconsian values while she resumed her life there.)
Sonny With A Chance does take place in the Disney Channel Live Action Universe...The characters where just breaking the fourth wall with all the references to the other show's, thus making the references non canon.
Sonny was pregnant with Chad's baby.The reason she's not on So Random anymore is because she's on maternity leave.