What is the exact Description listed next to the 50k points under the Activity Detail tab of your points summary?
If it says something like: PRG $1K spend/50K MR Points (example from a recent PRG bonus), then I would contact a CSR, because you want those extra 10k. Can I ask how much of your required spend you were at when you received it? Perhaps they do have you down for the wrong bonus with a lower spend requirement.
If it says something else in the description, then you could take a risk, reach your 3k spend, and see if you get the 60k on top. A possible error in your favor. But time is never on your side when dealing with bonus issues, so there is the risk that that 60k will never materialize, and then you're left with trying to resolve this a month later. If that risk is too high, call now and have them figure out what the heck is happening.