There's not a lot of confusion.
Once you're approved for your 1st card = HP then your subsequent apps are SP unless you're borderline for approval criteria then there's that 1 in a million chance you'll get a HP again.
The key once you're in is reading the verbiage on the APPLY screen. If it says "pre-approved" then it's a SP and if it says "expand your membership" it's likely a HP.
*and we return you back to regular programming already in progress*
Congrats on the 2X approvals!!! Welcome to the AmEx fam! It's a nice place to be!