Electrical circuit breakers are a safety device to protect your homes wiring from overheating from excessive currents /overloads, and breakers need to be sized properly to assure that your wiring is protected from overheating and damage.
It is a common to see improper breaker sizing in older homes and this can cause a safety issue and a fire hazard and it is worth it to get it checked out by a licensed electrician to make corrections to alleviate any problems.