that's how it works if you're sorting multiple columns.
- Click "Vendor" - table is sorted by vendor
- Click "Model" - table is sorted by vendor and then model
- Click "Vendor" - table is sorted by model and then vendor
If model is the primary column then the table is sorted by vendor as well (since one model only belongs to one vendor). Basically if you're sorting by multiple columns every time you want to change the sorting you have to click all the columns again, clicking a column that's already been clicked puts it at the end of the column list, in terms of priority.
Thank you, Michal
However it's not clear from user prospective.