Looking at your feedback you have made 139 transactions in last 12 months.
If you make several tranactions with the same seller in a one week period only i feedback is counted even though they all show
It only shows 89 in your feedback score because that is the number of unique transactions you have aquired.
Read the following link and see why feedback may have been removed.
http://pages.ebay.ca/services/forum/feedback.html