Yes it is very common especially regarding 3rd part scheduling or test results. The doctor's office's trigger to call you is the facility/doctor doing the biopsy contacting your doctor's office. If they don't contact your doctor's office then they won't contact you. Most system's (automated or manual) flag the need for action based on something that happens to trigger it, not something that doesn't happen., Hence you are the trigger for something that doesn't happen. This is a good thing, not a bad thing. Your doctor's office gave you an exact time frame and an exact instruction. Rather that making your feel unimportant, this should make you recognize that your are important and the center of your own treatment, and your doctor wants to be absolutely sure nothing falls through the cracks, and he is including you in that process.
Get use to that. I think one of the most important lessons and realizations on this cancer journey is that YOU are the central player in it, you are the pivot point, your own advocate.