I have had different monitor resolutions before, until I got my 4k monitor, I had a 1080 monitor and a 1280 x 1024 monitor with no problems at all.

I think the the problem lies with the changing...

Will do :)

I purchased a 4K monitor and also have a 1080 monitor on my system.

I have set the size of text, apps and other items in the Display options on the 4k monitor at 150% so its readable, at 100% the...