What did you buy? What version of LR. There are several depending on the reseller. Some may have LR 5 still for sale. Others may have both the subscription based LR CC and also sell LR 6 (Which is basically the same version as CC). and then other sell either the subscription based version or the standalone 6 version. The difference between CC and 6 is how it is registered.
CC with an Adobe ID tied to a subscription plan, 6 with an Adobe ID that is not associated with a subscription plan and you use a serial number.
Which one did you buy and from what reseller?