영어Through Entertainment #10: Houston, we have a problem. Who's Houston?

[thelostseoul]

This is the latest of a series of English hints which use scenes from entertainment to learn English.
It isn't really meant for elementary students, but might be useful for middle-school age students through adults.
There is a category on the blog where you can click on other hints. 

http://www.seoulgyopoguide.com/?p=1498

To all teachers: keep your head up.  English is an essential skill for Korean students of all ages.

[astericks]

It's a poorly written article. It's full of errors.
Why does the author state that the phrase can't be explained? What's understated?
We've had  a problem. This is past tense, yet the problem could or could not still persist.
We have a problem. This is present tense. The problem is occurring now.