cyclplus AS2 Ultra

hey there,

i recently purchased a cyclplus pump as mentionned in the title. watched a YT video from the cyclplus channel on how to inflate my tires and all. so the issue is, the PSI showed on my cyclplus seems like its wrong? as i was inflating 1 of my tire, (front one if it even matters lol) it was showing 30psi and i was pressing/feeling my tire and it just felt like it was at 100. i had to stop the pump manually since its supposed to stop automatically at 70. what am i doing wrong? anyone else had issues inflating and understanding the pump when they first used it? i am screwing the adapter into my presta valve as recommended in the YT video (like how tight do i even screw it?).

thank you!