New External Door problem

[obyapka]

Hello,

I've fitted a new external side door to my garage - it IS an external door, it's pine and sold by B&Q (£69 with a glass pane). I have added wood protection, fitted it 2 weeks ago, all was fine until yesterday when I noticed the bottom rail is starting to catch the sill, and now today it is sticking. I've removed the door and the entire length of the bottom rail is protuding by maybe 2-3 mm. I presume this is due to rain and damp. (north facing door). Should I simply remove this "excess" or what?

thanks
Brian

 

[crank39]

Id wait for it to shrink again and then remove the door and seal absolutely everything with more paint,stain,varnish,preserver or whatever!