Shiny DTS/IR-GTS help

[whachadodat4]

Ok so i got a problem here, i've worked for about a day on it with no success. So maybe someone here knows.

Background Information:I was told sending a pokemon from you game to your computer and sending it back multiple times was a legit way of cloning. So i hatched a 31/31/31/31/26/31 shiny jolly axew the other day and i am currently trying to clone it

Problem: I have succesfully sent the pokemon files to my computer, but as of right now i can no longer send it back

Other Information: Yesterday i got the error 31275 (or something similar) which means gts is overcrowded, but today i got 51200 which means something is wrong with my router. I went back to "Auto Obtain DNS" and my gts worked, so something is wrong with my program/how i'm using it

Question: Does an expert on IR-GTS/Shiny DTS have an idea on what I might be doing wrong and/or can help me fix it?