sounds like every decent t50 gearbox ive ever driven. most gearboxes these days wont let you go into 1st unless youre stationary or less than 20km/h. i always double clutch so it always goes in, but this is only when im about to stop do i put it in 1st.
i dont know why you need 1st gear on such a close ration gearbox like a t50 unless youre starting from stop, so dont worry about it.