BPM Counting 6/8

I wanted to make a song in 6/8 Blues. My Chord-Sheet and a BPM-Finder-software with mp3 show 75 BPM. In the BBManager i have to set the tempo to narly 100 to get the same. Is there a special counting in the BBM?

How are you creating the beat and setting the signature—within the BBM?

I always had trouble when setting the signature when creating a beat within the BBM and getting it to follow that signature and tempo. However, when I created the song in a DAW and set the signature there, the MIDI file had the correct time signature in the BBM.

I just took a “song” from the original BB Blues Folder. in the BBM i had to speed nearly a 1/3 more.