[Corsa C 2000-2006] key fob issues

[snoopy]

i have a 2002 1.2 sxi corsa c, and when i open my doors using the key fob sometimes both doors open at the same time, sometimes just drivers side. is this batteries?

[Vegas]

May sound obvious but on mine you have to
Press open twice to open more than just drivers door. If you're doing that, does petrol cap and boot open aswell as drivers door?

[snoopy]

yeah it does vegas.