I have been in the dog box twice now recently because I have missed recording the end of shorty street

I normally have the recording set to record 10 mins after it ends just to be safe as I found early on that it would sometimes run over by a few minutes. However with the problems I was having I kept having to resetup the recording and a couple of times forgot to setup the overrun.
I have always had media centre setup to record 4 mins before and after but it seems this is not enough.
Does anyone else find this as well? And if so how do the likes of mysky cope??
I have started running the latest patch for the TV pack again and have noticed that it finally does what has always annoyed me. It would always record for example the beginning of Two and a half men at the end of shorty street and then the rest under the recording for two and a half men.
It now records the two and a half men from the beginning as well as the buffer for shorty street BUT that has now caused a new problem. It uses both tuners during the overlap which means that if I have something set to record on another channel starting at the same time as two and a half men it does not record.
However if you get rid of the padding it looks like it will record (have not tested yet). But then I think I will start missing the end of some programs again

I dont want to have to get a third DVB-S tuner card just to I can record effectively two channels at once
