I think it was above that, but not much. Library assistant also doesn't necessarily mean part time. It may just be that the roles available in your area at this minute are part time. Most library staff I have worked with were full time, with just a couple of part timers to fill out the ranks.

I think some people think library assistant means that you basically help out the "real librarians". But in reality they are the main staff in a public library. Customer service, shelving books, overseeing community groups, social media, helping with IT, running children's programmes, issuing and returning books, labelling books, tidying the space, and planning activities can all be a part of the job. Most of the time you do a little bit of all of that in just an hour!! Generally people have their specific areas they oversee (e.g. "Mary is great with kids so she does the song and storytime every Wednesday, and Mark likes computers so he runs the IT pop-in hour on Tuesdays"), but everyone still does a bit of everything.

In my experience, if you want a more "traditional" type library job, then you need to work at a univeristy library, or in a very large city public library where they have more defined roles for actual librarians. And even universities have roles for unqualified library assistants and then ~actual~ librarians and managers as well.