Jarrad, it is unlikely the chain was too long when it was fitted: it has probably stretched. If it has, it will quickly ruin the sprockets if it has not already done so. You can check whether the chain is out of pitch by removing it, and holding it straight, edge-on. The slack in the pivot pins (and that is what chain stretch is) will result in it drooping over its length. If it droops substantially it is garbage, and you should post pictures of the sprockets so we can see if they are worth keeping.
It is not impossible of course that someone replaced a worn chain with one a couple of links too long. If that is the case, you will find out when you do the wear check. You can fairly easily shorten the chain. You can also buy a half-link if necessary to get it to fit.
