My CS Incorrectly Displayed to Both Teams

Quick Synopsis: When jungling with Trundle, I've noticed twice that my CS displayed jumps around, and the other team has noticed too. Gold stays the same.

Full Version: Was playing Jungle Trundle the other day when halfway through the game some guy on the other team says, "Hey Trundle, maybe if you cleared jungle camps you'd be able to buy items." I had been clearing camps and I'd bought numerous items, so I basically ignored the comment. Later in the game (I forget exactly how) someone realized my CS was improperly displayed. I then used /all chat and talked with the guy who'd made the comment and he was like, "Oh, I made the comment because it said you had 5 CS." Apparently, on other player's screens, my CS would sometimes show different values. Because it was mid-game (and I was trying to win) I didn't ask or track very many details on it (because my gold was staying the same and I was clearly getting gold from camps) but I did notice this: On the top of my screen, my CS score would often jump +/- 25. For example, it might jump between 98 and 123 every 5-10 seconds. If I then killed a single jungle monster, it would jump between 99-124. I can't verify that either was correct, but in any event it did grow from killing monsters but would switch between two numbers that were 25 apart (from the comments from the player on the other team, he saw different numbers than I did).

Within the next few days, I'm playing jungle trundle again and a player on the other team makes some comment on /all chat about my CS. I simply commented that it was a visual bug that I'd encountered before and that my CS was higher than he was seeing. I didn't track it anymore that game (sorry, I'm a player, not a play-tester :p).

Unfortunately I can't give you much information except that its happened twice, both on Trundle, and both when I was jungling. I'm fairly positive I was using "Grasp of the Undying" Keystone mastery (and definitely not Strength of Ages).