Might be a daft question but I’ll risk it:
I’ve just created a text link and it’s come out as:
http://slotocash.com/get/a/204312
I’ve also previously been giving this link for a different campaign:
http://slotocash.com/get/a?id=24602
I noticed that the format at end of the link is slightly different, ie.
a?=123 becomes a/123
Does this make a difference to tracking? Have you simply changed the link structure?