Sure your pickups aren't adjusted all wacky? Got another bass you can put the strings on to see if the problem follows the strings to the new bass?
Me - I'd just play the hell out of them and wait for 'em to settle. But that's me.
P'ups are fine. I'll spank the TIs for 2 weeks. If they still sound like a 2 rounds + 2 flats after my next 2 gigs, I'll do the Amazon swap.
I LURV these stings enough to deal with a funky break-in ritual if I have to.