No Replies to my Replies?

Okay, so I’ll admit, I’m kind of a newbie at this shirt submission thing. Derby subs I get, all of those prints have gone fine. But I’m really confused as far as regular subs go.

I’ve subbed 3 designs so far. The first one I got no reply on at all (at least 6 months ago).

The second one I got a reply within a few weeks, signed a contract, sent my file on it’s merry way. Then I got a “we didn’t recieve your printfile” notification. I figured maybe the file was just too big so it didn’t send right so I made it smaller and resent it. I haven’t heard anything since. That was two months ago.

The third one I got a reply a few weeks after submitting asking for some minor design revisions first and then to just reply with a few jpgs of the changes and not to go through the submitting process again. So I did and that was nearly 2 months ago and I never got a reply from that either.

I tried emailing them directly seeing if I was doing things correctly but haven’t gotten a response from that either. (over a month)

Am I doing something wrong here? Why aren’t I getting any replies? Am I just being impatient? Thanks!