Running OS 10.8, Acrobat Pro XI, 11.0.02. I mark my redactions and when I click apply, I get the black boxes, but I also have lines that start from the top each cell that contains the redaction to the bottom left corner of the page. The redactions are needed to redact sensitive material in a form that I believe is setup with tables. I've tried turning off/on different comments/annotations, but still. Only work around is highlight what I need redaction and choose the color to be black. Clicking on the lines do nothing. Not sure if I need to turn something on/off or if it's the form itself.
It would be helpful if you posted a screen capture of what this looks like. You can attach it to your reply using the Camera icon in the editing window.
Are you using the redaction tool? If so, what are the properties you have set for the tool? I use the redaction tool all the time, but I have it set to have no color so the only indication of the readation is the absence of content :-) and I am using X.8.3 with Acrobat XI.0.2, but I had similarly good outcomes with X.8, X.8.1 and X.8.2 as I use the redaction tool frequently.