Sounds like they may be an autumn fruiting variety rather thsn summer? If you leave them and wait and get raspberries this year, that may confirm it. I don't think summer raspberries would flower now, but others may know differently.
The summer rasps that I've grown just send up new shoots during year one, these get tied onto wires for support during winter (during winter they look pretty dead and woody) and then the start to shoot leaves and flowers in the spring of year 2 and they fruit by summer.
The stems that have fruited in year 2 are cut down after fruting finishes and new canes that have grown up alongside them are tied into wires and will flower and fruit during year 3, and so on.
If they are autumn raspberries, then they are cut down to the ground after fruiting, there wouldnt be any stems to tie into wires, and fresh growth emerges from mid spring onwards, this fruits in the same year from summer through to late autumn.
Meant to say, sometimes autumn types do start to fruit in summer, so that may be what you've seen, or maybe you have 2 varieties there.