Recently I've seen some expressions on the Internet such as;
- I had difficulty 'in' finding a new job.
- Did you have any trouble 'with' translating the report?
Well..... I think these sentence should be;
- I had difficulty finding a new job.
- Did you have any trouble translating the report?
Am I wrong?
I've checked how to use difficulty/trouble with 'verb + ...ing", and in my grammer book these prepositions (e.g. in / with) are not used with those expressions. But I've checked them on the online dictionaries, and then some similar examples with prepositions appeared.
These are from Cambridge online dictionary.
- People with asthma have difficulty in breathing.
- [+ ing form of verb] She had great difficulty finding a job.
...... Now I'm really confused. I can't distinguish the diffrence between these two, I mean, when I should put the preposition 'in', and when I should not put it.

Could you please explain about them for me?
Many thanks in advance,
Candy