Their site says they serve lunch at 10:30. I was told here today they weren't serving until 11. Is this a common thing here?

I stopped going there. Everyone I have dealt with in this restaurant is inept

If it's a weekends they start lunch a half an hour later than during the week.

Must have forgotten to change the time .

Lunch at 11

Yes. Common. They stop serving 90% of their menu like an hour or two before they close at night. It's ridiculous. Also they are no longer a red burrito store . Meaning no taco anything.