Hi there

Is the problem something like this, highlights green shawdows magenta or vise versa with clean paper white around. If so you have a cross curve problem, first off have you tried changing the negative to make sure the negative is not the fault.If so I would agree with Claire that you have a bleach to dev contamination situation. some how the bleach fix is seeping into the developer?
Do you have any equipment in the room with LEDs ,humidifier,radio bla bla bla??
Also look for reflecting objects in the room . Your shirt, posters, cans of air and light leaks around the enlarger.
Also I would highly recommend you check the original chemicals to make sure you are using the right components, dilutions and mixing methods.
good luck