Adelphi

Can anyone help me please.  I am in Thailand.  My passport expires 16 Feb 21.  I intend renewing it in Thailand early in the New Year.  I have a re-entry permit which allows me to remain in Thailand until 13 Feb 21.  I wish to leave Thailand on 12 Feb to do a visa run.  I will be out of Thailand about one week.  Assuming we can travel by then is it essential to have my re-entry permit transferred from my old to my new passport at the IO before I leave Thailand? 

Thanks in advance for any help. 

I have only recently come to Thailand so apologies if this is a silly question but is there an advantage in 

applying outside of Thailand