The One legged Ringed Sanderling

Ive been following Sanderlings at Seafield now for over a decade and had kept a photo record of the ringed birds till a hard drive collapse this year.
This bird was on Quilty beach today showing the same tag as in a post I published in 2012  but now missing a right foot.,,,did the right leg once have a red/blue rings ??
http://www.alifeattheshoreline.com/2012/02/re-united-at-seafield.html