anyone having issues on SHORTBUX?

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I joined shortbux a few weeks back and, like all the PTC sites I join, I try them out before trying to refer people to them. Shortbux STARTED out as what seemed like a promising site but now, after clicking my 3rd or 4th link, it will suddenly open up the ad window 15 times in a row over & over & over again so I have like 20 windows running at the same time. This has happened the last 3 times I logged in to view ads... Has anyone else have this problem? Could it be a fluke or is it just a sign that ShortBux is NOT as legit as they want you to think?