There can be problems with your shopping cart software if you do not chose the best one. Like most programs there are always problems that might arise. If you have a programmer who is going to create your own shopping cart software for your online store, the problems might be bigger or they may have more problems than the shopping cart software programs that are already available for your to use. That is why it is better to just use one that many people already use instead of getting an original one. They both will work just as great and you can always modify the given shopping cart software. The reason why these shopping cart softwares that have been already established have fewer problems is because they have already gone through a beta. Since it has been tested already reputedly that means all of their small problems already have been solved by their own programming team.