Having trouble with online play

another member of this forum and I were attempting to summon each other to make a trade. At first, when he was trying to summon me (White Soapstone Sign) it kept failing. We tried quitting and reloading, replacing the sign, etc. but nothing worked. Then I tried to summon him, and I couldn't even see his sign. During this time, we was summoned and invaded multiple times by different people, whilst I had no other player interaction at all. 

Does anyone have any idea what the problem might be? I have had trouble summoning and being summoned in the past. 

We were both human throughout.

Bad luck? Dark Souls' finicky online?

It may be something wrong with your connection if your friend keeps failing to connect to you, or maybe it's their connection that could be the problem. I'm no expert here but I would recommend signing out and signing back in, if that doesn't work maybe resetting your modems.

@Dibs, we were both the same level (SL10) and the summoning failed several times without replacing the sign. I find it odd that he got invaded and summoned by other people, but I did not, nor did I see any other signs.

OK, I'll try that tomorrow