question about delegation 关于代理

Since I joined steemit in March, I've been trying all different things and especially fascinated by delegation. Thanks to a good old friend@bobdos who delegated 100 sp for me to start, I carry on posting every day. I also tried to lease sp from MinnowBooster, to buy and sell votes, and to fill in others' sp lease request. I'm not good at technical like many of you, but I learn through trying. Now I have a problem. I made two market delegations via MinnowBooster. One stopped daily payout two days ago and the other one didn't pay out anything at all. I don't know if any of you had this before. Is there anything wrong please...
自从三月加入Steemit，一直做各种尝试和试验，对代理特别感兴趣。也辛亏老朋友@bobdos一开始就代理了我100个sp，让我能坚持每天发帖，保持活跃。我也试着从MinnowBooster上租sp，买赞卖赞，甚至出租sp给别人。我不像你们好多人都是技术型的，我只会摸着石头过河，哈哈。但现在有个问题，我在MinnowBooster上出租了两笔sp，那个少一点的之前每天支付给我0.005 steem，两天前付过后就没有再支付了，另外一个多一点的干脆就只告知交易成功，并没有任何支付。。。这种情况各位有遇到过吗？ 正常吗？求解惑！