Hi...ebay computers are like people in some way, when people eat too much they gain weight, then they need to exercise to loose the weight.
The computers are the same when too much information is stored and not being used they tend to slow down, that is one reason ebay deletes them.
You might want to consider trying TL (Turbo Lister) and have that information saved on your computer and bring up at anytime you like, here is some information on TL:
http://pages.ebay.ca/help/sell/turbo-lister-ov.html