Oh David, this is hard to explain even for teachers...I will try to explain:
A clue to distinguish them is to ask What? ( you get the DO - lo, la, los, las) or To Whom? ( you get the IO - me,te,le,nos,os,les)
'Le queremos dedicar el programa' is gramatically incorrect way to say it,as it should be 'les' because 'a todos aquellos...' is plural and they mut be in accordance
so, yep, it is an example of leismo.. as the speaker in your first example is taking 'a todos aquellos...' as DO