Great Western Coffee Shop

For a number of reasons recently, time keeping on the Salisbury to Exeter line has been extremely poor.

Several times I have been passing Pinhoe station and noticed that the Exeter-bound service has been running 20+ minutes late and the xx:33 service has been shown on the CIS as expected at xx:53. This timing sounds reasonable 'under normal circumstances'. However, as you know, the section from Honiton to Pinhoe is single track and the Waterloo-bound service at xx:34 has just departed towards Honiton.  Hence, the Exeter-bound service is unable to leave Honiton until xx:53 at the earliest. Yet, the CIS still displays an expected arrival of xx:53.

I have lost count of the number of times that I have spoken to pax waiting on the platform to explain that the Exeter-bound service will not be arriving until at least xy:15. 

Is there any way that the CIS programming can can be intelligent enough to realise that the displayed time is unrealistic because of the single track section?