100 fps footage showing as 25fps

Hello - any help massively appreciated.

I shot some footage at 100fps as I've normally done loads of times in the past. Imported all footage including some 25fps to a new project, started a new 25fps sequence and added the 100fps footage. Accidentally clicked change to match, but now even my source footage is all 25fps? I've tried making a brand new project and importing direct from the card (not the drive as I did originally), still 25.

I'm  not sure if I'm being incredibly stupid or if something has happened? 

Can anyone advise? 

thank you