OK, i have been enlarging for a few weeks now and have been using neutol wa, water rinse, and tf4 fixer. It was all good and fine but I ran out of developer.

Now iím using photographersformulary 130, water rinse and tf4. Whenever I put the prints into the fixer they get darker. It never happened with the other combination. Why does it get darker? Is it normal. Here are my times

develop- 2:00
firstrinse- 0:30
final rinse- 1:00