I was hoping you could shed some light. I took a test this morning, looked after a few mins - nothing. Went on to have my shower, promptly forgot about the test and looked probably about an hour later. There's an evaporation line. So far so good, last 2 times I had an evaporation line one turned into a MC and the other is DD, I think I'd gotten distracted those times as well and looked much later than I should have.
However, the evaporation line is where the control line should be, the control line is where the test line should be. Diagram says to ignore a single line if it appears where the test line is, but doesn't explain what should happen if the lines seems to have switched places. Is the test still invalid?