Has anyone else noticed weirdness with step sequencer clips and linking/grouping?

Not sure how to recreate this, but nonetheless:

I understand that when you create a clip with the step sequencer, then you drag a copy from that clip, the two clips are linked. You can then choose "unlink step sequencer clips" if you want to unlink them. 

Well, during my incessant fiddling with a step sequenced drum track tonight, in which I was haphazardly unlinking step sequencer clips and then adding them to selection groups and then removing them etc, it came to pass at some point during the proceedings that dragging a copy of a step sequencer clip would NOT result in two linked clips, as per the normal behavior. It was if clip linking had become disabled somehow (although I certainly don't see any such option). 

Not only that, it became impossible to open certain clips in the step sequencer for editing. Let's say I had two clips both named "Clip 1," which were originally linked, but then unlinked, and then made into a selection group, and then removed from that group (as an example of the kind of incessant clip fiddling of which I was partaking). If I opened the first "Clip 1" in the step sequencer, it would in fact display the second "Clip 1" instead. Thus it became physically impossible to edit the first "Clip 1" in the step sequencer. It was as if the fact of the two clips having the same name, and having been linked and grouped in the past, confused Sonar to the point where double clicking on one opened the other of the same name. 

I'm aware that having two separate unlinked clips with the same name is probably a bad idea from an organizational standpoint, but hey, it happens. And I certainly don't want a repeat of tonight's fiasco, in which step sequencer clips were so dysfunctional that I had to write off the whole charade and revert to the last saved version. Perhaps I'm missing a fundamental understanding of the way in which clip linking/grouping works? I know I'm not explaining this very clearly but it's hard to do so since I'm not entirely clear what the hell happened to begin with.