Same rank card drawn on 2 pair deal

[Sailing_Away]

I have noticed that, while not every time, an awful lot of times when I am dealt two pair and am drawing for a full house, the single card I draw is exactly the same rank as the card it replaces (e.g., 4 of clubs replaces 4 of spades; 6 of spades replaces 6 of diamonds, etc).

Has anyone else noticed this happening perhaps more often than it should?

I know that it's not happening every time because I was watching for it today, and it happened about 2 out of every 3 times I was in this spot. I have successfully drawn for a full house, and I have seen a miss by drawing some other rank card not matching my pairs.

[Sailing_Away]

Must have been a flukey string of luck. I haven't seen this pattern continue.