Don't worry teeth seem to do whatever they like really!
Tom's top molars started coming through the day after his 1st birthday when he only had the 2 top front and 2 bottom front ones. By 14 months he had those 4 plus 4 more at the front and 4 molars. I'm still waiting for the canines to come through so he's had a gap for 5 months now.
My Lo is the same. He got his bottom 4 teeth, then top 4, then his molars started. He's got 2 molars top and bottom both sides now but gaps in between where his other teeth should be. So it sounds fine to me!
Any opinions, advice, statements or other information expressed or made available on BabyandBump.Momtastic.com by users or third parties, including but not limited to bloggers, are solely those of the respective user or other third party. They do not reflect the opinions of BabyandBump.Momtastic.com and they have not been reviewed by a physician, psychologist or parenting expert or any member of the BabyandBump.Momtastic.com staff for accuracy, balance or objectivity. Content and other information presented on BabyandBump.Momtastic.com are not a substitute for professional medical or mental health advice, counseling, diagnosis, or treatment. Never delay or disregard seeking professional medical or mental health advice from your physician or other qualified health provider because of something you have read on BabyandBump.Momtastic.com. BabyandBump.Momtastic.com does not endorse any opinion, advice, statement, product, service or treatment made available on the website. If you think you have a medical emergency, call your doctor or emergency services immediately.