I have responded via the e-mail support ticket that you have with us.
Below is a modified version:
'When using the filtering or Maths Channel feature, the number of samples across the screen is limited to 5MS (when using the PicoScope 6.11 Beta
software). If you are collecting less than this amount, please try increasing the number of samples.
Otherwise if you could please provide further information indicating where the problem is occurring (an annotated screenshot would be fine) I would be happy to investigate further.'