Yeah, I was thinking about that little detail as well. He says his family restricted him because he was becoming "too indulgent" with the dog walks (it's hard to tell how much of what he reports is actually what people tell him, his interpretation of what they are telling him, or assumptions on his part due to a unique lack of curiosity/arrogance), so I wonder if they got some phone calls by business owners/police about what they initially thought was a vagrant sleeping and dumpster diving on their property.
Your confusion is certainly understandable, as Sweet's jeremiads involve experiences most associate with being an undergraduate: living in a dorm, eating meals in the caf', working on the student paper. But yeah, from what we've been able to piece together here, the timeline goes like: gets kicked off paper --> graduates--> enters graduate program --> (perhaps almost immediately after?) gets expelled --> gets banned from campus.
Here's Sweet at graduation:
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