That label is certainly interesting. Only the person who chose it can tell is why and what it means (for them), but for me such a label would probably be an attempt to counter the cisnormative construction of binaries - such as the gender binary, but also the binary between trans* and cis. I assume many cis people would define themselves as "not trans", thereby drawing a very clear line and carving out a neat, clear cut identity for themselves by saying what they are not (basically, making a distinction between self and other). If we were capable of breaking up this binary, this either/or thinking, that would actually be quite an achievement in my opinion.
These are are the associations I get when I see "cisgenderqueer". I may be totally off...