Yes, and from what I've read, your dosage is pretty high. It's within limits for short-term daily use, but high (1330 mg) for single dose - 1000 mg. is the recommended maximum within a 6 hr. period. (Yes, I see it works out proportionally) For long-term use (longer than 2 weeks), the recommended maximum is now 2600 mg./day (which comes out to 2 - 325 mg tabs every 6 hrs.).

Something to look into is the supplement NAC (N-acetyl cystiene). It's what hospital ERs give patients for tylenol (acetaminophen/paracetamol) toxicity/overdose. Taken daily, it may reduce/avoid potential liver damage from paracetamol.
See: http://yarchive.net/med/tylenol.html

I've been taking acetaminophen/paracetamol with NAC for many years now. I just had my liver tested again this past week and it is well within normal.