rpm issues and shifting noises

[bill SBRA]

here goes just bought my 2010 sportback rallyart last week drove good durng test drive but last cpl days i've noticed thae my rpm's while driving at a steady speed will drop 300-500 every few secconds and my exhaust will get louder when it does. I was told when i got inspection sticker that it had a chip in it and when i was in the bay i could hear a chick from the engine when the rpm's moved that sound ok? Also when i come to a stop in auto sometimes when it shifts down from 2nd to first i can hear a slight noise as it gets into first. And also when i shifr from park to reverse and drive i can hear the dual clutch try to find reverse or drive almost like it cycles a couple times before it gets into reverse that mormal? Any help would be great i'm pretty new to these kind of cars i'm a former jeep guy.