From: VastlySuperior
You could also try to bring down the tolerance on your dtm and see if it gets less hits for the object you are looking for, also look if something is unique near the tree and try to include that in your dtm to find the tree, Uniqueness it the key with dtm`s and as low as possible tolerance on the dtm you want to find.
Otherwise, go with the tpa which will be even more accurate.
It's not totally correct to say that TPA finding is more accurate than DTM. DTM is in fact a more accurate form of TPA that tries to match both the color and the distance between the main/sub-points. Right because of the demanding accuracy it may not be reliable to find objects on mainscreen (not because it returns false positive, but rather it cant find any because of the changing color/deformed objects!)
And of course, another reason i prefer TPA is that DTMs take too much time to create and hog memory (unless you recall and free them after every use)