I'm from Europe and it struck me as odd that the subject of the sentence switched from singular to plural for no good reason. >My girlfriend worked at Macys >

I'm from Europe and it struck me as odd that the subject of the sentence switched from singular to plural for no good reason. >My girlfriend worked at Macys >She was paid >(She) was in a "union" >Each month we would walk >we paid "dues" >we couldn't pay online >we handed our check >throw her check I was just wondering if there was some hidden twist behind the change of subject, so I asked bluntly.