(1) Upon motion filed within ninety days after the movant receives notice of the award in a record under RCW 7.04A.190 or within ninety days after the movant receives notice of an arbitrator's award in a record on a motion to modify or correct an award under RCW 7.04A.200, the court shall modify or correct the award if:

(a) There was an evident mathematical miscalculation or an evident mistake in the description of a person, thing, or property referred to in the award;

(b) The arbitrator has made an award on a claim not submitted to the arbitrator and the award may be corrected without affecting the merits of the decision upon the claims submitted; or

(c) The award is imperfect in a matter of form not affecting the merits of the decision on the claims submitted.

(2) If a motion filed under subsection (1) of this section is granted, the court shall modify or correct and confirm the award as modified or corrected. Otherwise, the court shall confirm the award.

(3) A motion to modify or correct an award under this section may be joined with a motion to vacate the award.