Putting the microwave and the coffee maker on the same circuit is fine unless you turn them both on at the same time. Looking at the circuit map of my house makes me laugh because the bathroom outlet where the hair dryer is used is on that very same circuit! Me thinks some rewiring is in order.
Husband to one wonderful wife, father to five fantastic children, juggler, technophile, freelancer, DIYer, adventurer, volunteer, KO4NFA (2m/70cm), WRMJ225 (GMRS)
Disclosure: I am a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for me to earn fees by linking to Amazon.com and affiliated sites.