The timing is interesting though, and suggests that the Jackets know exactly who Vegas is taking in the draft (not really a surprise). Otherwise, there's really no rush to get him signed right now. But you could spin it either way regarding Korpi staying or going:
1) Jackets know Vegas isn't taking Korpi - it has been rumored that they were making a deal to protect him and maybe that has been finalized. Plan is for Korpi to back up Bob again, so now they went ahead and got him signed.
2) Rumor mentioned above was a smokescreen and Jackets actually want Vegas to take Korpi instead of say Karlsson or others. Vegas said they would but part of the stipulation was that he was already under contract for 2 years at a reasonable cost. With 2-year deal, he is still an RFA at the end. Vegas maybe didn't want to take the chance of him filing for arbitration if he wasn't signed.
I think option 1 is the most likely.