At idle the difference in my temps is about 2c under load its about 6c (ish). Your reading may be inaccurate. If so then assuming that things run fine now, regardless of the improper temps reported, so long as those improper temps remain "improperly" the same you shouldn't be too concerned.
However this is OVERCLOCKERS.COM so I suggest you round your cables, put a seperat sink and fan on EVERY chip, "swiss cheese"ify you case, load up on fans and pelts and run the thing inside a walk in refrigerator in the arctic circle. (it can't hurt)