IE 9 and Blocks

I now have confirmed on 5 different pcs that with some upgrade probably thanks to Microsoft and using IE that I cant make any major changes in blocks like deleting them or adding them. When I use Firefox no issues on the same pcs but using IE I cant make any block changes, as when I do it shows it works then reload the page and bam any blocks I deleted are right back there. Anyone else having this issue? I know I will have to look up recent updates cause its causing something.