In this sentence, the first comma is used to separate the first independent clause from the second independent clause, and the second comma is needed after the introductory word therefore. You do not need a third comma between and and therefore.

Does therefore have two commas?

When you use however, furthermore, moreover or therefore as intensifiers or for emphasis, we usually put commas around both sides of them.

Should therefore be separated by commas?

When you use a conjunctive adverb (therefore, however, nevertheless, consequently, for example, on the other hand, moreover, besides, accordingly, thus) to join two independent clauses (complete sentences), precede the adverb with a semicolon and follow it with a comma.