First some background:

Snapshots are not entries in the "change history" of a workspace/stream, so you:
- cannot see them in the Pending changes view
- cannot accept them
- cannot deliver them

But this can be confusing because when you create a snapshot in a workspace/stream, it will create a baseline in each component that does not currently have a baseline for the configuration of that component in that workspace/stream.  And the name of each created baseline will be the name of that snapshot.  So it *looks* like you have snapshots showing up in your pending changes view, but you don't ... what you see are incoming/outgoing baselines that were created by the snapshot.  And the fact that these baselines are only created in components that did not already have a baseline for the current configuration exacerbates the potential confusion.

Note also that deleting a snapshot has no effect on any baselines that were created by that snapshot.  So that is why you still see that incoming object in the Pending Changes view ... you are seeing the incoming baseline for that snapshot.

So back to your actual question, the only way to make that incoming baseline disappear is by either:
- doing the replace, as you suggest
- just accepting the incoming baseline (that is the easiest thing to do).

Reminder: Please post your question in the form of a question (I modified the subject of this question to convert it to the question I believe was being asked).

Cheers,
Geoff