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I can only assume by your transaction history you are referring to @buildawhale as that is the only one you sent 1 SBD to in the last month.

The post did, in fact, receive a vote (547% ROI!)

Your last vote as shown in the screenshot was not 1 SBD but only 0.10 SBD and would not receive a vote as it was less than the 1 SBD minimum.

transaction details from my wallet is as below:
3 days ago Transfer 1.000 SBD to buildawhale https://steemit.com/blockchain/@bobinson/applying-blockchain-innovations-to-highly-transnational-network-dependent-services
@bobinson said he has not received it. i checked his wallet but found nothing. you check and give if it is credited.
another thing is @bobinson did below transaction which got voted to me.
3 days ago Transfer 0.100 SBD to lovejuice https://steemit.com/surfing/@nagavolu/world-s-best-surfing
but when i did why was not it? with the same bot?

He does not receive a vote in his wallet, he receives it on his post and he did, in fact, receive it, he got a crazy 541% vote. I can't speak for LoveJuice, but I have a feeling he just didn't wait long enough (2 hours 40 minutes).

yes @themarkymark thank you for your guidance. i checked his votes in SteemWorld and found the votes. he got the 0.1 SBD also. 11.9%. form LoveJuice also. i just checked. may be he didn't check in votes. any how he got it. i am happy. i should take back my apprehensions regarding bot. i have been following you. but did not witness vote. just now i am going to do that also. though i joined 5 moths back since i did not have knowledge about witness and the systems i didn't. i had lot of confusions. slowly leaning. i am not a technical person. just know how to do on net.
however. thanks a lot. i request your continues support. you are my witness now. by the way i voted only 8 witness. can you suggest few more good witnesses

:) Thanks.

You can see the witnesses I vote for on the bottom left of:

steemd.com/@themarkymark

I am the one who created all this confusion. my apologies. ... I was helping @nagavolu to use bid bots.

I was under the impression that the buildawhale upvote was from my bid which I placed one day prior to @nagavolu's bid ? ( he was testing it) .. Can you cross check that ?

  1. My transaction : https://steemd.com/tx/15cd8c7fc3b2047a549b155b4ef0c306ee003fec

  2. @nagavolu https://steemd.com/tx/686db0844b896a10c90da9b2e60dab09b74e3980

If you already bid on the post, then yes a second bid wouldn't work unless if it was in the same window (2 hours 40 minutes), then they would be combined in a larger bid (2 SBD).

Ok, so in this the upvote was from my bid and not from @nagavolu's right ?

Yes, that's what it looks like. I didn't know there were two bids until you mentioned it.