Having a strange issue happen

In the last few days I am seeing callsigns in the DX Call window just pop up. Today this happened and I did some checking to see where/why this call would show up like this. This is happening using JTDX 160.RC2 my computer is Windows 10 with all relevant updates. I then looked at my all txt file found I had answered this callsign`s CQ at 213430UTC he did not call me back next over. I worked another station in meantime then at 213645 utc he calls me one time we did not work I was working other stations. Then 2E1EVM starts showing up in the DX call window if I delete call it returns on next decode cycle and is placed into JTAlert also. This call was not in any decodes that I saw and I halted decodes and looked for callsign in decodes window it was not there I had bypass on so I should have seen all decodes on screen. Delete call again I shut down JTAlert the call continues to be placed into DX CAll window. Close JTDX and finally call stops showing up. This is not first time I have seen this happen but in past I just did not pursue just deleted call and went on. Just a strange occurrence that just recently started to happen. JTDX had been open for a few hours but not decoding. Maybe someone else has seen this or has a answer?

Thank you guys for all you do I use JTDX a lot and really enjoy it
73 Morris WA4MIT long time JTDX user and supporter.