Deals on Deals - what's the problem?

[Ontario_Tory]

Here's some chat from The Sunday Second chance FT. They chopped when it was 4 handed, leaving 10K for the winner.

Once it got to HU, the following chat happened:

Dealer: We are now Heads Up
HostRichardR [Support]: Nice game PBR
HeadwoundHal: gl noex
NOXQZEZ: want to play or split the 10k
NOXQZEZ: gg
HostRichardR [Support]: 27k on the way
HeadwoundHal: can we still deal?
NOXQZEZ: hal
Dealer: NOXQZEZ, it's your turn. You have 15 seconds to act
HostRichardR [Support]: No sorry the deal is complete
NOXQZEZ: ok
HeadwoundHal: didnt think so



Why would this be an issue? The two of them are basically playing HU for 10k. If they choose to split that up, why would it matter if a deal was agreed upon earlier? That deal is still valid - they're making a 2nd deal for the side pot.