unlocking itself!

[vwwvgolf]

afternoon all

recently moved and now my car is kept in a gated car park under the block of flats.
ive come down in the morning to go to work to find that my car is unlocked but the alarm is still armed.

im 100% sure its locked when i leave it. is this down the central locking unit? or the alarm playing up?

only seems to do it when park in the same car park.... anyone else had similar issues?
starting to worry me slightly 

[spikenipple]

Do you keep the key in your pocket? 

[vwwvgolf]

i wish it was something as simple as that! 

[Screech16v]

Maybe someone else who uses that car park has the same code on their alarm fob thus when unlocking their car yours also  time for a steak out 

[vwwvgolf]

its funny since i posted this its stopped happening.
must be someone on here sneaking it for a spin at night!