That isn't the habitual aspect.
The habitual ("I would go to auditions", "I used to go to auditions" or the unmarked "I went to auditions") refers to something that happened repeatedly (or happens repeatedly or will happen repeated, in use with other tenses).
The progressive is used to state that something was (is/will be) happening at the time.
The classic example is something like "I was reading a book when the phone rang" where the continuous action is constant, especially if then interrupted (permanently or temporarily) by an action in a subsequent clause).
However, it can also be used of repeated actions that are thought of as the continual state the subject is in. Hence if I say "I was working a crappy job when I got a lucky break", I don't mean that I was working that job constantly 24/7 (even the worse jobs allow occasional breaks for sleeping and eating) or necessarily that I was actually at work when the lucky break happened, but that my repeatedly working that job (which we can express in the habitual as "I used to work a crappy job") describes the general state that was the context for what else happened (the lucky break in this case).
As such, while the progressive "I was going to auditions" isn't the same as the habitual, it can still express repeated actions because we're thinking of those actions not as a series of separate incidents, but as a continuous action.