Supposedly PHPLD doesn't have reciprocal links working well for some reason. I have done a few things and have a few things left I am going to try. It is really too bad but if reciprocals won't work well I may just make it so you submit as regular but if there is no reciprocal I won't re-write the description and accept.
If you can't submit just submit regular with a reciprocal and in the description write RECIPROCAL NOT WORKING
That's the best temporary fix I can give. Again my apologies I"m annoyed with it as well.