One plane landing shortly after another departs is standard procedure, provided they have sufficient separation [0]. However, the separation in this case became too tight after the previous landing had vacated the runway, so ATC issued a go-around - but the missed approach procedure and standard departure route for that runway coincided, resulting in the close approach [1].

Note that not enough separation in this case (for the landing) is probably about a mile.

[0] http://tfmlearning.faa.gov/Publications/atpubs/ATC/atc0310.h...

[1] http://avherald.com/h?article=4cb85fbe&opt=0