Welcome to the Q&A Forum

I recently Received a PR-8 Backlink from  a very authorative site. Its been 3 weeks now and it seems ALL my rankings are actually down .As i continue to check my rankings for the top 10 keys every day,I see the ranks jumping from 09 down to 42 and back up to 09,This is every day it seems the last week ...It just seems that in 3 weeks the bouncing would stop by now. The keyword i am speaking of actually gets about 250,000 searches a month. Prior to the pr 8 link i was solid at #11 Google. BUT now im at #12 - #13..Does anyone think that maybe something else is going on here??

My question sounds stupid . But I had a good Moz rank for my Domain also Moz trust.It was in the high 400s for both..I was very happy with this score  My DA also dropped considerably. There was not much of a reason i could see,In fact my page scores still were up there and never moved. But the domain scores plummeted. I had added a Blog to my site once i added the blog there were roughly 13 pages involved.Of these 13 pages i had problem errors ,notices ,and warnings for all the blog pages.I did not notice this until a couple days ago . The 13 errors were mostly duplicate description tags ,302 redirect ,and other small stuff like this .. like fl** Could these items listed above actually be the problem behind my scores all dropping like flies??** And with the update being only 3 days away if i repaiir these right away do you think i will get my scores back ?? Or will i have to wait for another 30 days ...I really dont want to be left standing with such a low score ..I already started making the repairs. Thank you all...