There are random words that seemingly trip up a filter (in certain circumstances). For example, it's been noticed through the Ultimate Chart Hit Tournament thread that if you try to post "Call Me Maybe" at the start of a line, it'll get the error, but if you censor it to something like "C*ll Me Maybe", it works. I'm guessing your tracklists contain one of those words (nobody has a list).
Usually you can get around it by posting via hitparade (the Swiss version of this site; you can log in with the same username/password). You can view any thread there by changing 'australian-charts.com' to 'hitparade.ch' in the URL, for example: https://hitparade.ch/forum.asp?todo=viewthread&id=61621