as promised, I've gone through the whole of the Perthshire list in search of what needs changing:
Lundin Farm & Pitnacree (http://www.themodernantiquarian.com/site/177) should be split in two, as they're quite far from each other. The grid ref on this site is for Lundin Farm, while Pitnacree round barrow & standing stone is at NN929534
The Appin of Dull Standing Stones (http://www.themodernantiquarian.com/site/401) should be listed as rock art as they aren't standing stones. The grid ref is also wrong (this is the grid ref for Carse Farm I) - the field in which The Appin of Dull cup-marked stones are in is centred on NN804492. The last 2 images on the right on The Appin of Dull page (posts 8163, 8164) are actually of Carse Farm I (http://www.themodernantiquarian.com/site/785)
The Kor Stone (http://www.themodernantiquarian.com/site/3105) has been lumped in with the Braes of Fowlis group (http://www.themodernantiquarian.com/site/775), but is actually 7km away and so should be on its own
Auchterarder Standing Stones (http://www.themodernantiquarian.com/site/2635) and East Hill Stones (http://www.themodernantiquarian.com/site/1736) are one and the same. Auchterarder is the name they're known by, and Easthill is already listed as an alias on this record
Breas of Cultallich (http://www.themodernantiquarian.com/site/3078) should be spelt Braes of Cultallich
Clach an Tuirc (http://www.themodernantiquarian.com/site/4969) should be rock art and not a standing stone
Clach Na h-Ioabairt (http://www.themodernantiquarian.com/site/3489) should be spelt Clach Na h-Iobairt
Grange of Conon (http://www.themodernantiquarian.com/site/2903) is in Angus not Perthshire
Lyndoch standing stones (http://www.themodernantiquarian.com/site/3394, http://www.themodernantiquarian.com/site/3415, http://www.themodernantiquarian.com/site/3416) should be spelt Lynedoch. they could maybe be grouped together in a sub-group named Lynedoch, as they are all associated with each other on a small estate
Murlaganmore (http://www.themodernantiquarian.com/site/4967) is actually in Stirling
Orwell (http://www.themodernantiquarian.com/site/841) is in Fife
Upper Strathearn (http://www.themodernantiquarian.com/site/709) isn't really a term that's used, so these 5 sites should perhaps be on their own and not grouped together
well that lot should keep you out of mischief!
Cheers
Andy