Rebanding is not applicable in this case with this model scanner. However due to the fact that the sites are simulcast you may be experiencing a phenominon known as
simulcast distortion, a well documented & perhaps the most discussed issue on these forums. In a simulcast system, a site is not a single transmitter at a specific location, but rather a collection of transmitters spread out over a certain area that all transmit on the same frequency at the same time. It's all those signals coming to your scanner at the same time that cause most scanners to lock up, stutter, miss transmissions, etc. Ultimately the only scanners designed to mitigate the effects of simulcast distortion are the Uniden
SDS100 (portable) or
SDS200 (base). Yes they are the most expensive but they do the job right. There are a number of workarounds for other scanners mentioned in the wiki I linked but they work in very few cases.