Its poor script writing on the part of the coders with whom the admins IT team bid their work to. When something shows up like that its either a bug in their html script or whatever language of code they are running from their servers. I imagine java, its the leet language used by companies nowadays, i have no idea why its used since there is much better computer languages out there... anyways there's an over-view of why it screwed up.
It happens once in a while and I suspect it has to do with the user entering characters that cause and HTML instruction to be carried out. You entered >.< and everything after that got repeated in that messy way. Don't know if that is what caused it, or maybe that and the platform you are on (your phone).