I guess the question is - how many miles in the last 2 months since top up?
and - did they
actually add any oil at the service (which one was it - 1st or 2nd?), and again did they
actually top it up 2 months ago? - How long were you there? Did they let the oil settle then add the right amount, or did they just glug a bit in a hope?
so many questions!

(sorry!)