GotPR? said:right, but how could everybody on this forum conclude OP's husband illegally entered the US. It was not clarified yet. She mentioned he was illegal alien, but some people is often confused between illegals and overstayer.
She also mentioned he entered the US through Tijuana, though did not mentioned with or without inspection.
Til this point is clarified, no judgement should be done.
I'm pretty sure I understood the OP's husband entered illegally.
If he didn't, then he would have been able to adjust status. If he left the country after the overstay, then it was a huge mistake.