Uh-oh. The grammar police dun got me. I gives up, occifer.
Yes they did indeed. You have to understand that language is a tool, and if you are careless, ignorant, or plain didn't pay attention in school, and mis-use it, it reflects poorly upon you and makes one wonder what else did you get wrong. There is no picture of you, nor your resume, alongside your post, so all readers have to go on is content and how it is presented.
An analogy is you take your car for a tuneup and it comes back driving funny because the tire pressures are incorrect. Hmmm, you wonder, did they even bother to check the fan belt. Little things add up to big things, because of a nail the battle was lost, etc. Tense is a simple thing, no tricky punctuation, and you got it wrong. I'm sure you won't be so careless next time.