Confusion with PE seating

Hello everyone,
I have been 'lingering' here for quite a while and have already gathered a lot of very useful information. Many thanks..
I have a query that I haven't been able to find an answer to through the search option.
I am travelling PE LGW-BGI soon and have logged into manage my booking to select my seats. The seat configuration plan for my flight is number 4. Unfortunately there were only 6 PE seats available to select and they are in the group of 4
Anyway, I have chosen them but would love to change them.
Looking through the tool box here at Configuration 4 I have become a little confused. The seat plan shows the second section of the Bubble in the lightest colour which according to the Key is EC (rows 75-80) - but on the left there is a list of Best PE seats and they include seats in rows 75-80. So are these PE seats or EC seats? - they are in the 3-3 configuration
Ideally if there are PE seats in the Bubble then I'd like to have one of them.
My second question is this: When I do on-line check-in do they open up more seats for selection so that I can hope to move my nasty ones in a group of 4 to something I'd prefer (ie in the bubble or in a group of 2)?
I was hoping to be able to change my selected seats during OLCI , if this is not possible I guess I can accept them and maybe just go to the check-in desk on the day to see if they can be changed....any thoughts?
Thanks in advance.
I have been 'lingering' here for quite a while and have already gathered a lot of very useful information. Many thanks..
I have a query that I haven't been able to find an answer to through the search option.
I am travelling PE LGW-BGI soon and have logged into manage my booking to select my seats. The seat configuration plan for my flight is number 4. Unfortunately there were only 6 PE seats available to select and they are in the group of 4

Looking through the tool box here at Configuration 4 I have become a little confused. The seat plan shows the second section of the Bubble in the lightest colour which according to the Key is EC (rows 75-80) - but on the left there is a list of Best PE seats and they include seats in rows 75-80. So are these PE seats or EC seats? - they are in the 3-3 configuration
Ideally if there are PE seats in the Bubble then I'd like to have one of them.
My second question is this: When I do on-line check-in do they open up more seats for selection so that I can hope to move my nasty ones in a group of 4 to something I'd prefer (ie in the bubble or in a group of 2)?
I was hoping to be able to change my selected seats during OLCI , if this is not possible I guess I can accept them and maybe just go to the check-in desk on the day to see if they can be changed....any thoughts?
Thanks in advance.