Sheet View Issues with Excel Web Browser

Hi, I have created a Excel document for my department to use, I tried Excel App but due to the size of the Spreadsheet it kept freezing, as a result I switched it to use Excel through Web Browser. The sheet no longer freezes which is good. I do have another issue though.....I wanted multiple users to be able to access, edit the sheet at the same time so I did some research and Sheet View seemed to be the way forward. I created a Sheet view for each employee to use so when you go to View, Sheet View and click on the relevant person their work is updated, saved etc and this shouldn't affect others view. This is working in terms of people editing.

The main issue now though is that despite following advice sometimes when someone changes a filter on their own sheet view it seems to change others view. My understanding was you can hide, filter etc within your own Sheet view but this doesn't seem to be the case.......PLEASE HELP!!!!

My excel and computer Skills aren't excellent to please any simple advise would be great.