The imports occur at the exact timing where the effects were created. Now if someone created them with a 25ms sequence and you import them into a 50ms sequence they will get shifted to align with the nearest 50ms marks. Maybe that's what's happening but there no bugs with the lyric imports. Lyrics are nothing special they are just effects. Everything on the entire sequencer grid is all the exact same Effect class, effects, timings, lyrics, all the same.