Board Thread:Wiki-Related Discussion/@comment-4839682-20140513092304/@comment-91424-20140602135012

"Snow Drifts", where Snow and Charming first meet, obviously takes place before "Queen of Hearts" (where Regina sends Hook to Wonderland to kill her mother, before casting the dark curse - which happened after Snow and Charming defeated King George and Regina, and after they got married). Also, in "Snow Drifts", Belle is still with Rumplestiltskin, but in "Queen of Hearts", she is Regina's prisoner.