"sticking block"

I'v been casualy watching a TV programme here in the UK. The format is that a family is living abroad and is considering a return to the UK. The show follows the family as they, under the guidance of the presenter, look at houses, schools, jobs, entertainment, etc.

Two phrases struck me during the programme.
While discussing pros and cons someone referred to something as a "sticking block". I've not met that phrase before. It appears to be a hybrid of "sticking point" and "stumbling block". Google finds a few instances of it:
299 for "sticking block"

Some of those results refer to mechanical devices in which a physical block is stuck and others refer to a move in martial arts.

584,000 for "sticking point"
1,390,000 for "stumbling block"
Odd wording was used by the man of the family who had a good job which he would have to leave if they relocated to the UK. He described it as "job with a good future behind it".
I understand what he meant, but..

Peter Duncanson, UK
(in alt.english.usage)