TRC P2Pool Confusion

[wmikrut]

I have the latest client for TRC running and P2Pool v11.2
When I look at the stats screen I am seeing some confusing results:

We go from block 102931 -- to 100045
Look down the list.

Is this a fork, or a 51% attack on TRC?

[Nolo]

Neither.  102977 is the last block found. 

[wmikrut]

Neither.  102977 is the last block found. 

When I check the client, I see the latest block is 102977.
When I look at the local data, the blocks are coming in in chronological order.
What I don't understand is why the P2Pool Number field seems to be populated out of sequence.

When I click on 102931 cryptocoinexplorer shows block data.
When I click on 100045 I get the block not found screen.

Is this due to the changes recently made?
I wonder if the older block numbers (100045) are people who haven't upgraded their client.

Sorry if I am the one confused... I am just trying to understand.