推荐信问题不一样，要各写一封么？大家怎么做？

的确很麻烦，不过没办法，好好和推荐人沟通以求得理解与支持吧。

可以在deadline之前先交本人申请，在deadline之后再交推荐吗？  如果这样，算前一轮还是后一轮？

我问过admission office同样的问题, 这是其中一所学校的回复供参考:

Regarding your recommendations, applications are deemed incomplete and not reviewed until all required materials are received.   It would depend on where your application falls in the review process.  The Admissions Committee reviews the right to push incomplete applications into the next round.