Dozens of check ins, very little coins

Ive been using this app for months and find it fun to compete with my friends. I travel for work, so Ive routinely been racking up a few hundred points by the end of the week. Not so much in the last two weeks, especially this week. I mustve checked in a few dozen times so far this week, and Ive only got 16 coins to show for it. All I get when I check in is who the mayor is. I reached out to Foursquare support who told me its happening because Im not physically in the places Im checking into (which isnt true at all, especially brand new places Ive never been before), or checking in too fast. Keep in mind Im doing nothing different than in the past where I was racking in hundreds of points weekly. Watching my friends scores climb, and mine stuck at sixteen for two days. Had a similar issue last week too, but not as extreme. Somethings not right, and its sucking the fun out of the app; not sure Ill continue to use it if some "rules engine" is determinedly falsely Im not where I say Im checking in. Needs work. Disappointing.

9$/7108!,:9:/an about Foursquare Swarm: Check-in App, v4.1.2