No rule on the books that says that BOTH can't happen in the same year.
No need to pole vault into those conclusions (since obviously "jumping" is way to small)
She may do "some shows" after her album is released. I seriously doubt that Fleetwood Mac is going to go on one of their long grueling tours like they did in 2003. Stevie's album will be out in March (*fingers crossed*), she can tour from then til June. The Fleetwood Mac tour may not start until August or September...or even later....even if Fleetwood Mac starts their tour in December of 2011, that's STILL 2011.