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I had my house built so my process took a little over a year so yeah I can see a SP being done to make sure the buyer hasn't tanked everything. 2 weeks isn't that long. Hopefully they pull your highest and give you a good limit.
All of my Synchrony cards were EX for account opening and always TU for SP limit increases. I would say with your score and profile you whould be good for at least $12k.
Had not heard before that Sync pulls EX. Thought they were pretty well a TU puller most of the time.
All my Sync accounts have been TU pulls, but all depends on where you live no doubt.