Cold Start Issue (maybe?)
 

If i'm correct, the proper warm up cycle for an S4 13b N/A is 3000rpm>1500rpm>settles at 750rpm, right?

Well my FC tends to warm up like this: 2500rpm>900rpm>then it'll go up to 1k-1500 once I start driving before settling in at the normal idle.

Everything seems to be fine, the engine never stalls, it runs great otherwise. So, is this a problem I need to address? or a sign of future issues? or should I just not worry about it.. Thanks!

Mine does both. Depends on the cars mood.