User Activity

I was stopped from buying from a seller unless it was more than 10 days from my last purchase why is that happening
watch list can't find mine or it becomes unresponsive and have to repeatedly have trying to get it to turn pages
why does ebay take purchases from my purchase hystory and put them in hidden because after contacting the seller and being told they will resend, I do not like to leave feed back till I receive the item but because it has been removed I cannot leave ...
star ratings disappear as soon as i put them on anyone had this problem
I have received a phone call from China (a seller) and I would like to know if this is usual