restaurant withheld my tips from my second paycheck, what should i do is this legal?

i live in OR and i recently started a job as a dishwasher i started around sept 7. i received my first check, which included my allotment of the tip pool + my hourly wage. i just received my second paycheck and it only had my hourly wage and no tips. i asked them and they said since i was training i didn’t get tips. but i have been working here almost two months so i assume i get my tips on my second paycheck as well. please any advice or suggestions thank you