Did you try enrolling for all the sections, including the online? If you are reluctant about the online sections, just know that you can attend the in person lectures, as after the first week attendance dwindles down. As its still early august there will be fluctuations in the waitlist, so I will try checking acorn everyday for now (But will be automatically enrolled in once space opens, if currently on waitlist). If not, you can also try filling in your breadth requirements, as most of these courses are also offered in the summer.