"But" is a coordinating conjunction connecting two independent clauses. The sentence structure is [Clause 1][Comma][Coord. Conjunction][Clause 2]. There is no comma that follows the coordinating conjunction.
Ah, so the same mistake. *Facepalm.* XD
Of course the comma comes before "but", not after.
Thank you. :)
Lesson learned: make corrections when you're rested.
